Added some .github-Files

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug Report
+description: Found a Bug that needs to be fixed?
+body:
+- type: markdown
+  attributes:
+    value: |-
+      Please join the [Discord Server](https://discord.gg/0hMr4ce0tIl3SLv5) for questions or ask them in [our Discussions](https://github.com/discord-jda/JDA/discussions).
+      
+      Keep in mind that this isn't the place to learn Java.  
+      Please head over to [Stack Overflow](https://stackoverflow.com/questions/tagged/java) for your general programming questions.
+- type: checkboxes
+  attributes:
+    label: General Troubleshooting
+    description: You confirm to have made the following checks first.
+    options:
+      - label: I have checked for similar issues on the Issue-tracker.
+        required: true
+      - label: I have checked for PRs that might already address this issue.
+        required: true
+- type: input
+  attributes:
+    label: "Version of JDA"
+    description: |
+      Please let us know, which specific version of JDA you used.
+      If your version is outdated, maybe try updating and see if that already fixes your problem.
+      You can see the latest version in the [Releases](https://github.com/discord-jda/JDA/releases).
+      To find out your version, you can add `System.out.println(JDAInfo.VERSION);` in your code.
+    placeholder: "For example 5.0.0-beta.7"
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: "Expected Behaviour"
+    description: "What did you expect JDA to do?"
+    placeholder: "JDA should do ..."
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: "Code Example for Reproduction Steps"
+    description: |-
+      Please add the code you use to reproduce this problem.  
+      Make sure to remove or replace any sensitive data like your Bot's token.
+      Put "N/A" if you don't have a reproducible setup.
+      
+      The provided text will be rendered as Java code, so you don't have to provide a Code block for it.
+    render: java
+    placeholder: |-
+      public void causeError() {
+          throw new Exception("Error!");
+      }
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: "Code for JDABuilder or DefaultShardManagerBuilder used"
+    description: |-
+      Please provide the code used to create your JDA or ShardManager instance.  
+      Make sure to remove or replace any sensitive data like your Bot's token.
+      
+      The provided text will be rendered as Java code, so you don't have to provide a Code block for it.
+    render: java
+    placeholder: 'JDA jda = JDABuilder.createDefault("token").build();'
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: "Exception or Error"
+    description: |-
+      Share any Exception or Error you encountered.  
+      Leave this blank or put "N/A" if you don't have an Exception or Error.
+      
+      The provided text will be rendered as code, so you don't have to provide a Code block for it.
+    render: yesyes # Unknown code-names = no highlighting.
+    placeholder: "java.lang.NullPointerException: null"

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Discord
+    url: https://discord.gg/0hMr4ce0tIk3pSjp
+    about: The JDA Discord is the best place to receive fast support for your questions.
+  - name: Questions
+    url: https://github.com/discord-jda/JDA/discussions
+    about: You can ask questions about JDA and find useful information in our Discussions.
+  - name: Javadoc
+    url: https://docs.jda.wiki/
+    about: The Javadoc is the perfect place to retrieve information about various methods within JDA.
+  - name: Wiki
+    url: https://jda.wiki/
+    about: You can find answers to common questions on our Wiki. Make sure to read the FAQ page!
+  - name: Releases
+    url: https://github.com/discord-jda/JDA/releases
+    about: You can find the latest releases here on GitHub and on Bintray.
+  - name: Snapshots
+    url: https://jitpack.io/#discord-jda/JDA
+    about: You can find the latest dev builds on JitPack.
+  - name: Jenkins
+    url: https://ci.dv8tion.net/job/JDA5/
+    about: Dev builds also available on the Jenkins CI Server.

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature Request
+description: Request a new feature
+body:
+- type: markdown
+  attributes:
+    value: |-
+      Please join the [Discord Server](https://discord.gg/0hMr4ce0tIl3SLv5) for questions or ask them in [our Discussions](https://github.com/discord-jda/JDA/discussions).
+      
+      Keep in mind that this isn't the place to learn Java.  
+      Please head over to [Stack Overflow](https://stackoverflow.com/questions/tagged/java) for your general programming questions.
+- type: checkboxes
+  attributes:
+    label: General Troubleshooting
+    description: You confirm to have made the following checks first.
+    options:
+      - label: I have checked for similar issues on the Issue-tracker.
+        required: true
+      - label: I have updated to the [latest JDA version](https://github.com/discord-jda/JDA/releases/latest)
+        required: true
+      - label: I have checked the branches or the maintainers' PRs for upcoming features.
+        required: true
+- type: textarea
+  attributes:
+    label: "Feature Request"
+    description: "Provide a small description of the feature you want to have added."
+    placeholder: "JDA should get ..."
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: "Example Use-Case"
+    description: |-
+      Provide some code or describe a possible use-case for this feature.
+      
+      The provided text will be rendered as Java code, so you don't have to provide a Code block for it.
+    placeholder: "public void newAwesomeMethod(){}"
+    render: java