add issue templates & funding

.github/FUNDING.yml

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+# https://docs.github.com/en/github/administering-a-repository/managing-repository-settings/displaying-a-sponsor-button-in-your-repository
+
+custom: https://www.paypal.me/ChrisGrieser
+ko_fi: pseudometa

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug Report
+description: File a bug report
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: textarea
+    id: bug-description
+    attributes:
+      label: Bug Description
+      description: A clear and concise description of the bug.
+    validations:
+      required: true
+  - type: textarea
+    id: screenshot
+    attributes:
+      label: Relevant Screenshot
+      description: If applicable, add screenshots or a screen recording to help explain your problem.
+  - type: textarea
+    id: reproduction-steps
+    attributes:
+      label: To Reproduce
+      description: Steps to reproduce the problem
+      placeholder: |
+        For example:
+        1. Go to '...'
+        2. Click on '...'
+        3. Scroll down to '...'
+  - type: textarea
+    id: version-info
+    attributes:
+      label: neovim version
+      render: Text
+    validations:
+      required: true
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Make sure you have done the following
+      options:
+        - label: I have updated to the latest version of the plugin.
+          required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Suggest an idea
+title: "Feature Request: "
+labels: ["enhancement"]
+body:
+  - type: textarea
+    id: feature-requested
+    attributes:
+      label: Feature Requested
+      description: A clear and concise description of the feature.
+    validations:
+      required: true
+  - type: textarea
+    id: screenshot
+    attributes:
+      label: Relevant Screenshot
+      description: If applicable, add screenshots or a screen recording to help explain the request.
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Checklist
+      options:
+        - label: The feature would be useful to more users than just me.
+          required: true