Add an issue template to report issues properly

.github/ISSUE_TEMPLATE/bug-report.yml

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+name: Bug Report
+description: Create a report to help us fix broken features
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to open this issue to help improve PyVista!
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: Describe the bug, what's wrong, and what you expected.
+      description: |
+        Provide a clear and concise description of what the bug is.
+        Provide a clear and concise description of what you expected to happen.
+      placeholder: Tell us what you see!
+      value: "I found a bug!"
+    validations:
+      required: true
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Steps to reproduce the bug.
+      description: |
+        Please provide a list of steps to reproduce the bug.
+        Please include a code snippet to reproduce the bug in the text box below.
+      placeholder: Provide some code for us to reproduce the bug!
+      value: "```python\nInsert code here\n```"
+    validations:
+      required: true
+  - type: textarea
+    id: system-information
+    attributes:
+      label: System Information
+      placeholder: The log will automatically be formatted! No need to type backticks.
+      description: |
+        Please run the following code wherever you are experiencing the bug, and paste the output below.
+        This report helps us track down bugs and will be critical to addressing your bug.
+        ```python
+        # Get system info
+        import pmmsh as pm
+        print(pm.Report())
+        ```
+      render: shell
+    validations:
+      required: true
+  - type: textarea
+    id: screenshots
+    attributes:
+      label: Screenshots
+      description: If applicable, please add screenshots to the text box below

.github/ISSUE_TEMPLATE/config.yml

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+contact_links:
+  - name: Questions and Discussions
+    url: https://github.com/pyvista/pmmsh/discussions
+    about: For general questions and discussions

.github/ISSUE_TEMPLATE/feature-request.yml

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+name: Feature Request
+description: Request that a feature be added to PyVista
+labels: ["feature-request"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to open this issue to help improve PyVista!
+  - type: textarea
+    id: feature-details
+    attributes:
+      label: Describe the feature you would like to be added.
+      description: |
+        Provide a clear and concise description of what you would like added.
+      placeholder: Tell us what you see!
+      value: "I have an idea for a new feature!"
+    validations:
+      required: true
+  - type: textarea
+    id: VTK-Links
+    attributes:
+      label: Links to VTK Documentation, Examples, or Class Definitions.
+      description: If you are requesting that a feature from VTK be wrapped or exposed, please include the relevant links below.
+  - type: textarea
+    id: pseudocode-and-screenshots
+    attributes:
+      label: Pseudocode or Screenshots
+      description: Feel free to include pseudocode or screenshots of the requested outcome.
+      placeholder: Provide some code for us to reproduce the bug!
+      value: "```python\nInsert code here\n```\nOr drag your screenshot here!"

.github/ISSUE_TEMPLATE/maintenance-request.yml

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+name: Maintenance Request
+description: Request general maintenance to code, CI, deployment, or otherwise
+labels: ["maintenance"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to open this issue to help improve PyVista!
+  - type: textarea
+    id: maintenance-request
+    attributes:
+      label: Describe what maintenance you would like added.
+      description: |
+        Provide a clear and concise description of the maintenance problem.
+      placeholder: Tell us what you see!
+      value: "I have a maintenance suggestion!"
+    validations:
+      required: true
+  - type: textarea
+    id: code-links
+    attributes:
+      label: Links to source code.
+      description: If you are requesting maintenance for a specific line of source code, please include the permanent link for that line.
+  - type: textarea
+    id: pseudocode-and-screenshots
+    attributes:
+      label: Pseudocode or Screenshots
+      description: Feel free to include pseudocode or screenshots of the requested outcome.
+      placeholder: Provide some code for us to reproduce the bug!
+      value: "```python\nInsert code here\n```\nOr drag your screenshot here!"