Issue Template revamp

.github/ISSUE_TEMPLATE/bug-report.yml

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+name: Bug Report
+description: Create a report to help improve Seurat
+title: "BUG: <insert-descriptive-title>"
+labels: [bug]
+
+body:
+  - type: markdown
+    attributes:
+      value: Thank you for taking the time to file a bug report.
+  - type: markdown
+    attributes:
+        value: Before continuing, please check the issue tracker to see if the bug has already been reported. Also check the [changelog](https://github.com/satijalab/seurat/blob/main/NEWS.md) in case the issue has already been fixed in the development version of `Seurat`.
+  - type: textarea
+    attributes:
+      label: Issue Description
+      description: |
+        Please provide a clear, concise description of the issue. What did you 
+        expect to happen? What actually happened? Please be as specific as 
+        possible.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Reproducing Code Example
+      description: |
+        Please provide a minimal reproducible example demonstrating the issue 
+        using `pbmc_small` or one of the datasets available via 
+        [`SeuratData`](https://github.com/satijalab/seurat-data). The script 
+        should not depend on any files or variables specific to your local environment.
+      render: R
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Error Message
+      description: If any, please paste the *full* error message here.
+      render: shell
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Additional Comments
+      description: |
+        Please include any additional information that maybe relevant.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Session Info
+      description: Please paste the output of `sessionInfo()` here.
+      render: shell
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

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+contact_links:
+  - name: Analysis Question
+    url: https://github.com/satijalab/seurat/discussions
+    about: Ask the community a question about Seurat or single-cell analysis
+
+blank_issues_enabled: true

.github/ISSUE_TEMPLATE/documentation.yml

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+name: Documentation
+description: Create a report to help improve Seurat's documentation
+title: "Documentation: <insert-descriptive-title>"
+labels: [documentation]
+
+body:
+  - type: markdown
+    attributes:
+      value: Thank you for taking the time to file a report.
+  - type: markdown
+    attributes:
+        value: Before continuing, please check the issue tracker to see if the problem has already been reported.
+  - type: textarea
+    attributes:
+      label: Issue Description
+      description: |
+        Please provide a clear, concise description of the issue. Make sure 
+        to include a reference to the specific page on https://satijalab.org/seurat 
+        and/or the relevant [man/*.Rd](https://github.com/satijalab/seurat/blob/main/man) 
+        file(s).

.github/ISSUE_TEMPLATE/feature-request.yml

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+name: Feature Request
+description: Suggest new feature for Seurat
+title: "Feature Request: <insert-descriptive-title>"
+labels: [enhancement]
+
+body:
+  - type: textarea
+    attributes:
+      label: Motivation
+      description: |
+        Please explain your motivation for the request. Why would the feature 
+        be useful? Is your feature request related to a problem? If so, please 
+        describe it.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Feature Description
+      description: |
+        Describe the feature. Please be as specific as possible.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Alternatives
+      description: |
+        Please describe any alternatives you've considered. If applicable, 
+        include workarounds or existing features that partially address your 
+        request.
+    validations:
+      required: false