adding templates for PRs and reports

.github/ISSUE_TEMPLATE/---bug-report.md

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+---
+name: "⚠️ Bug Report"
+about: Report a bug with existing Flutter MediaPipe features.
+title: "\U0001F41B [PLUGIN_NAME_HERE] Your issue title here"
+labels: 'Needs Attention, type: bug'
+assignees: ''
+
+---
+
+## Bug report
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+### Steps to reproduce
+
+Steps to reproduce the behavior:
+
+1. Go to '...'
+2. '...'
+4. See error or incorrect behavior
+
+### Expected behavior
+
+A clear and concise description of what you expected to happen.
+
+### Sample project
+
+Providing a [minimal, reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) project which demonstrates the bug in isolation from your main App _greatly_ enhances the chance of a timely fix.
+Please link to the public repository URL.
+
+---
+
+## Additional context
+
+Add any other context about the problem here.
+
+---
+
+### Flutter doctor
+
+Run `flutter doctor` and paste the output below:
+
+<details><summary>Click To Expand</summary>
+
+```
+PASTE OUTPUT INSIDE HERE
+```
+
+</details>
+
+---
+
+### Flutter dependencies
+
+Run `flutter pub deps -- --style=compact` and paste the output below:
+
+<details><summary>Click To Expand</summary>
+
+```
+PASTE OUTPUT INSIDE HERE
+```
+
+</details>
+
+---

.github/ISSUE_TEMPLATE/---documentation-feedback.md

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+---
+name: "\U0001F4DA Documentation Feedback"
+about: Report an issue with the relevant MediaPipe documentation or suggest an improvement.
+title: "[\U0001F4DA] Your documentation feedback title (CHANGE ME)"
+labels: 'good first issue, type: documentation'
+assignees: ''
+
+---
+
+Please describe your documentation issue or suggested improvement in detail here and provide links to any pre-existing/relevant documentation and screenshots if necessary:

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Feature Request
+    url: https://github.com/google/flutter-mediapipe/discussions/new?category=feature-request
+    about: Share ideas for new features.
+  - name: Ask a Question
+    url: https://github.com/google/flutter-mediapipe/discussions/new?category=q-a
+    about: Ask the community for help.
+  - name: Show and tell
+    url: https://github.com/google/flutter-mediapipe/discussions/new?category=show-and-tell
+    about: Share what you've built with FlutterFire.

.github/PULL_REQUEST_TEMPLATE.md

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+## Description
+
+*Replace this paragraph with a description of what this PR is doing. If you're modifying existing behavior, describe the existing behavior, how this PR is changing it, and what motivated the change.*
+
+## Related Issues
+
+*Replace this paragraph with a list of issues related to this PR from the [issue database](https://github.com/google/flutter-mediapipe/issues). Indicate, which of these issues are resolved or fixed by this PR. Note that you'll have to prefix the issue numbers with flutter/flutter#.*
+
+## Checklist
+
+Before you create this PR confirm that it meets all requirements listed below by checking the relevant checkboxes (`[x]`).
+This will ensure a smooth and quick review process. Updating the `pubspec.yaml` and changelogs is not required.
+
+- [ ] I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
+- [ ] My PR includes unit or integration tests for *all* changed/updated/fixed behaviors (See [Contributor Guide]).
+- [ ] All existing and new tests are passing.
+- [ ] I updated/added relevant documentation (doc comments with `///`).
+- [ ] The analyzer (`melos run analyze`) does not report any problems on my PR.
+- [ ] I read and followed the [Flutter Style Guide].
+- [ ] I signed the [CLA].
+- [ ] I am willing to follow-up on review comments in a timely manner.
+
+## Breaking Change
+
+Does your PR require plugin users to manually update their apps to accommodate your change?
+
+- [ ] Yes, this is a breaking change.
+- [ ] No, this is *not* a breaking change.
+
+<!-- Links -->
+[issue database]: https://github.com/google/flutter-mediapipe/issues
+[Contributor Guide]: https://github.com/google/flutter-mediapipe/blob/master/CONTRIBUTING.md
+[Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo
+[pub versioning philosophy]: https://dart.dev/tools/pub/versioning
+[CLA]: https://cla.developers.google.com/