chore: GitHub issue and PR template

Author: marcelkliemannel

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: Report a reproducible problem with the plugin
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for opening an issue! 🙌
+
+        Please provide as much detail as possible so we can reproduce and investigate the problem.
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Bug description
+      description: What happened?
+      placeholder: Describe the problem clearly.
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to reproduce
+      description: Please provide a detailed, reproducible description.
+      placeholder: |
+        1. Open ...
+        2. Click ...
+        3. See error ...
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      placeholder: What did you expect to happen?
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual behavior
+      placeholder: What actually happened?
+    validations:
+      required: true
+
+  - type: textarea
+    id: stacktrace
+    attributes:
+      label: Stack trace or logs
+      description: Paste any stack trace or relevant logs here, if available.
+      render: text
+
+  - type: textarea
+    id: screenshots
+    attributes:
+      label: Screenshots or screen recordings
+      description: Add screenshots or recordings if they help explain the issue.
+
+  - type: input
+    id: ide-version
+    attributes:
+      label: JetBrains IDE and version
+      placeholder: IntelliJ IDEA 2024.3, WebStorm 2024.3, PyCharm 2024.3, etc.
+
+  - type: input
+    id: plugin-version
+    attributes:
+      label: Plugin version
+      placeholder: 1.2.3
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context
+      placeholder: Anything else that may help?

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Questions or support
+    url: https://github.com/marcelkliemannel/intellij-developer-tools-plugin/discussions
+    about: Please use Discussions for questions, support requests, and general ideas.

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Suggest an improvement for the plugin
+title: "[Feature]: "
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for opening an issue! 🙌
+
+        Please note: this is a general IntelliJ plugin intended to work across all JetBrains IDEs.
+
+        Features that are specific to one programming language, framework, or technology stack are usually out of scope for this plugin.
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem description
+      description: What problem are you trying to solve?
+      placeholder: Describe the use case or pain point.
+    validations:
+      required: true
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed solution
+      description: What would you like to happen?
+      placeholder: Describe the feature you would like to see.
+    validations:
+      required: true
+
+  - type: dropdown
+    id: scope-confirmation
+    attributes:
+      label: Scope confirmation
+      description: Is this feature general enough to work across JetBrains IDEs?
+      options:
+        - Yes, this is a general feature for JetBrains IDEs
+        - No, this is specific to a language, framework, or technology stack
+        - Not sure
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      placeholder: Describe any alternatives or workarounds you have considered.
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context
+      placeholder: Add screenshots, examples, or other context here.

.github/ISSUE_TEMPLATE/pull_request_template.md

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+## 🙌 Thanks for your contribution
+
+We really appreciate your effort in improving this plugin.
+
+---
+
+## ⚠️ Before submitting a PR
+
+Please note:
+
+- It is **required to open an issue first** before submitting a pull request.
+- The issue should clearly describe the problem and **propose a solution or approach**.
+- This ensures that changes are aligned with the overall direction of the project.
+
+👉 **Unsolicited pull requests (without prior discussion) are usually not appropriate and may be closed.**
+
+---
+
+## 🔗 Related Issue
+
+Please link the issue this PR is based on:
+
+Fixes #...
+
+---
+
+## ✨ What does this PR do?
+
+Describe your changes clearly:
+- What problem does it solve?
+- What was your approach?
+
+---