chore: replace legacy .md issue templates with YAML-based forms (#2174)

.github/ISSUE_TEMPLATE/01_bug_report.yml

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+name: Bug report
+description: Create a bug report
+labels:
+  - bug
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for reporting a bug! Please note:
+        - For general usage questions, consider asking on [GitHub discussions](https://github.com/lingui/js-lingui/discussions).
+        - Bug reports without reproduction steps may be closed.
+  - type: textarea
+    attributes:
+      label: Description
+      description: A clear description of the bug.
+    validations:
+      required: true
+  - type: checkboxes
+    attributes:
+      label: Verifications
+      options:
+        - label: I've checked [the docs](https://lingui.dev) and this isn't covered there.
+          required: true
+        - label: I've searched existing issues on [GitHub](https://github.com/lingui/js-lingui/issues).
+          required: true
+  - type: textarea
+    attributes:
+      label: Reproduction Steps
+      description: Steps to reproduce with minimal code sample.
+      value: |
+        ```tsx
+        import { Trans } from "@lingui/react/macro"
+        
+        export default function App() {
+           return <Trans>This should be translated!</Trans>
+        }
+        ```
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Expected Behavior
+      description: What you expected to happen.
+    validations:
+      required: true
+  - type: dropdown
+    attributes:
+      label: Macro Support
+      description: What macro are you using?
+      options:
+        - SWC with @lingui/swc-plugin
+        - Babel with babel-macro-plugin
+        - Not using macro
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: Lingui Version
+      description: Output of `lingui --version`
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: Babel Version
+      description: Output of `npm list @babel/core`
+  - type: input
+    attributes:
+      label: Framework
+      description: E.g. Create React App, Next.js, Vite

.github/ISSUE_TEMPLATE/02_feature_request.yml

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+name: Feature request
+description: Suggest an idea for this project
+labels:
+  - enhancement
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for your suggestion! Before proceeding:
+        - Check the [docs](https://lingui.dev) to see if this feature already exists
+        - Search [existing issues](https://github.com/lingui/js-lingui/issues) for similar requests
+  - type: textarea
+    attributes:
+      label: Problem Description
+      description: What problem are you trying to solve? E.g. I'm always frustrated when...
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Proposed Solution
+      description: Describe your suggested solution.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Alternatives Considered
+      description: What alternative solutions have you considered?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Additional Context
+      description: Any other context, screenshots, or examples?

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+contact_links:
+  - name: View documentation
+    url: https://lingui.dev
+    about: Check the official docs for answers to common questions
+  - name: Chat on Discord
+    url: https://discord.gg/gFWwAYnMtA
+    about: Join the Lingui community on Discord
+  - name: Ask AI
+    url: https://gurubase.io/g/lingui-js
+    about: Ask Lingui JS Guru - AI powered Q&A assistant