ci: add some github related templates

Signed-off-by: Daniel Hu <[email protected]>

Author: daniel-hutao

.github/ISSUE_TEMPLATE/bug-report.yaml

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+name: Bug Report
+description: Report a bug of DevStream
+title: ":bomb: `Bug`: "
+labels: bug
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: What Happened?
+      description: Please provide as much information as possible.
+    validations:
+      required: true
+  - type: textarea
+    id: repro
+    attributes:
+      label: How to Reproduce?
+    validations:
+      required: false
+  - type: textarea
+    id: else
+    attributes:
+      label: Anything else
+    validations:
+      required: false
+  - type: dropdown
+    id: version
+    attributes:
+      label: 'DevStream Version'
+      description: "To find out the version run: `dtm version`"
+      options:
+        - < v0.11.0
+        - v0.11.0
+        - latest
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yaml

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+contact_links:
+  - name: Support
+    url: https://cloud-native.slack.com/archives/C03LA2B8K0A
+    about: Support requests or questions related to DevStream

.github/ISSUE_TEMPLATE/documentation.yaml

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+name: Documentation Issue
+description: Help to improve our documentation
+title: ":open_book: `Docs`: "
+labels: docs
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: What should be changed?
+      description: Please provide as much info as possible.
+    validations:
+      required: true
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Please read the documents below.
+      options:
+        - label: I've read the document [Creating a Documentation for DevStream](https://docs.devstream.io/en/latest/development/mkdocs/) and [Document Translation(Chinese only)](https://docs.devstream.io/en/latest/development/translation.zh/). (If you want to submit a document type contribution.)
+          required: false

.github/ISSUE_TEMPLATE/proposal.md

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+---
+name: Proposal
+about: File a Proposal
+title: ":four_leaf_clover: `Proposal`: "
+labels: proposal
+---
+
+## What Would You Like to Add? Why Is This Needed?
+  <!--
+Note: For feature requests, please also engage with the PMC on Slack or WeChat.
+  -->
+
+
+
+  ## Design
+
+
+
+  ## Anything else
+  <!--
+  Links? References? Anything that will give us more context about this proposal.
+  -->

.github/pull_request_template.md

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+## Pre-Checklist
+
+Note: please complete **_ALL_** items in the following checklist.
+
+- [ ] I have read through the [CONTRIBUTING.md](https://github.com/devstream-io/devstream/blob/main/CONTRIBUTING.md) documentation.
+- [ ] My code has the necessary comments and documentation (if needed).
+- [ ] I have added relevant tests
+
+## Description
+<!--
+Describe what this PR does and what problems it tries to solve in a few sentences.
+-->
+
+## Related Issues
+<!--
+Will this PR close any open issues? If yes, would you please mention the issue(s) here?
+-->
+
+## New Behavior (screenshots if needed)
+<!--
+Describe the newly updated behavior, if relevant.
+-->