docs: Add issue templates

.github/ISSUE_TEMPLATE/bug-report.md

+---
+name: Bug Report
+about: Report a bug in the application
+---
+
+* **What is the current behavior?**
+<!-- Issues like "doesn't work" and then not providing information as to WHAT isn't working, may be closed without further comment.-->
+
+
+* **If the current behavior is a bug, please provide the steps to reproduce**
+<!-- providing steps to reproduce is vital in order to verify that it is indeed a bug in the software, and not just a misconfiguration on your part. It helps us track down the source of the problem. -->
+
+
+* **What is the expected behavior?**
+<!-- How is it supposed to work, but currently isn't? What's the expected outcome of what you are currently trying to do? -->
+
+
+* **Other information** (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, gitter, etc)
+

.github/ISSUE_TEMPLATE/config.yml

+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/documentation-request.md

+---
+name: Documentation Request
+about: Request for documentation about a certain aspect of the application
+---
+
+# Documentation Request
+
+<!-- Delete this line and everything below it, but read below first for information on what you should include -->
+Please include the following:
+
+ * Links to any existing documentation if it exists but is unclear.
+ * Information on what feature/aspect of this application needs updating / expansion.
+ * What you're currently trying to do with the application that has led you to require the given feature.
+ * Some background on what information you might like to see in the documentation.

.github/ISSUE_TEMPLATE/feature-request.md

+---
+name: Feature Request
+about: Request a feature for ServerPackCreatorAddonExample
+---
+
+* **What is the current behavior?**
+<!-- Issues like "doesn't work" and then not providing information as to WHAT isn't working, may be closed without further comment.-->
+
+* **What is the wanted/requested behavior?**
+<!-- How is it supposed to work, but currently isn't? What's the expected outcome of what you are currently trying to do? -->
+
+* **What are your reasons for making this feature request? Provide solid arguments on why I should start working on it.**

.github/ISSUE_TEMPLATE/pull_request.md

+---
+name: Pull Request
+about: Pull request for a change / addition / fix you made to the repository.
+---
+
+* **Please check if the PR fulfills these requirements**
+- [ ] Docs have been added / updated (for bug fixes / features)
+- [ ] Commit messages follow [conventional commits](https://github.com/Griefed/ServerPackCreator/blob/main/CONTRIBUTING.md)
+
+* **What kind of change does this PR introduce?** (Bug fix, feature, docs update, ...)
+
+
+
+* **What is the current behavior?** (You can also link to an open issue here)
+
+
+
+* **What is the new behavior (if this is a feature change)?**
+
+
+
+* **Does this PR introduce a breaking change?** (What changes might users need to make in their application due to this PR?)
+
+
+
+* **Other information**: