chore(global): added issue template

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: Create a bug report.
+labels: [bug]
+body:
+  - type: dropdown
+    attributes:
+      label: What package is the bug related to?
+      multiple: false
+      options:
+        - "typedoc-plugin-markdown"
+        - "typedoc-plugin-frontmatter"
+        - "typdedoc-plugin-remark"
+        - "typedoc-vitepress-theme"
+        - "typedoc-github-wiki-theme"
+        - "typedoc-gitlab-wiki-theme"
+        - "docusaurus-plugin-typedoc"
+      default: 0
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Describe the issue
+      description: Please describe what the issue and provide as many details as possible.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: TypeDoc configuration
+      description: Please provide TypeDoc and plugin versions and your options file or list of options you have set.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Expected behavior
+      description: Please describe what the expected behaviour should be.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Ask a question
+    url: https://github.com/typedoc2md/typedoc-plugin-markdown/discussions/categories/q-a
+    about: Ask a question on the discussions board.

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Create a feature request.
+labels: [enhancement]
+body:
+  - type: dropdown
+    attributes:
+      label: What package is the feature request related to?
+      multiple: false
+      options:
+        - 'typedoc-plugin-markdown'
+        - 'typedoc-plugin-frontmatter'
+        - 'typdedoc-plugin-remark'
+        - 'typedoc-vitepress-theme'
+        - 'typedoc-github-wiki-theme'
+        - 'typedoc-gitlab-wiki-theme'
+        - 'docusaurus-plugin-typedoc'
+      default: 0
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Background
+      description: Please describe what the desired new feature is aiming to resolve (provide as many details as possible).
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Proposed solution
+      description: Please describe what the proposed solution you would like to see.
+    validations:
+      required: false