[docs] Fix missing issue template (#3026)

.github/ISSUE_TEMPLATE/4.docs-feedback.yml

@@ -0,0 +1,53 @@
+name: Docs feedback
+description: Improve documentation about MUI Toolpad.
+labels: ['status: waiting for maintainer', 'support: docs-feedback']
+title: '[docs] '
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Please provide a searchable summary of the issue in the title above ⬆️.
+
+        Thanks for contributing by creating an issue! ❤️
+
+  - type: input
+    attributes:
+      label: Search keywords
+      description: Your issue may have already been reported! List the keywords you've used to search the [existing issues](https://github.com/mui/mui-toolpad/issues). This will also make your issue searchable for others.
+      placeholder: e.g. datagrid column resizing
+    validations:
+      required: true
+
+  - type: input
+    id: page-url
+    attributes:
+      label: Related page
+      description: Which page of the documentation is this about?
+      placeholder: https://mui.com/toolpad/
+    validations:
+      required: true
+
+  - type: dropdown
+    attributes:
+      label: Kind of issue
+      description: What kind of problem are you facing?
+      options:
+        - Unclear explanations
+        - Missing information
+        - Broken demo
+        - Other
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Issue description
+      description: |
+        Let us know what went wrong when you were using this documentation and what we could do to improve it.
+      value: |
+        I was looking for ... and it appears that ...
+
+  - type: textarea
+    attributes:
+      label: Context 🔦
+      description: What are you trying to accomplish? What brought you to this page? Your context can help us to come up with solutions that benefit the community as a whole.

docs/next.config.mjs

@@ -44,6 +44,7 @@ export default withDocsInfra(
       // SOURCE_CODE_ROOT_URL: 'https://github.com/mui/mui-toolpad/blob/master',
       SOURCE_CODE_REPO: 'https://github.com/mui/mui-toolpad',
       SOURCE_GITHUB_BRANCH: 'master',
+      GITHUB_TEMPLATE_DOCS_FEEDBACK: '4.docs-feedback.yml',
     },
     webpack: (config, options) => {
       return {