[close #16] add PR and issue template (#43)

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: "\U0001F41B Bug Report"
+about: As a User, I want to report a Bug.
+labels: type/bug
+---
+
+## Bug Report
+
+### 1. Describe the bug
+
+<!-- A clear and concise description of what the bug is. -->
+
+### 2. Minimal reproduce step (Required)
+
+<!-- a step by step guide for reproducing the bug. -->
+
+### 3. What did you see instead (Required)
+
+### 4. What did you expect to see? (Required)
+
+### 5. What is your migration tool and TiKV version? (Required)
+
+- TiKV:
+- TiKV CDC:
+- TiKV BR:
+- TiKV Online Bulk Load:

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: "\U0001F680 Feature Request"
+about: As a user, I want to request a New Feature on the product.
+labels: type/feature-request
+---
+
+## Feature Request
+
+**Is your feature request related to a problem? Please describe:**
+<!-- A clear and concise description of what the problem is. Ex. I'm always
+frustrated when [...] -->
+
+**Describe the feature you'd like:**
+<!-- A clear and concise description of what you want to happen. -->
+
+**Describe alternatives you've considered:**
+<!-- A clear and concise description of any alternative solutions or features
+you've considered. -->
+
+**Teachability, Documentation, Adoption, Migration Strategy:**
+<!-- If you can, explain some scenarios how users might use this, situations it
+would be helpful in. Any API designs, mockups, or diagrams are also helpful.
+-->

.github/pull_request_template.md

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+<!-- Thank you for contributing to TiKV Migration Toolset!
+
+PR Title Format: "[close/to/fix #issue_number] summary" -->
+
+### What problem does this PR solve?
+
+Issue Number: close #issue_number
+
+Problem Description: **TBD**
+
+### What is changed and how does it work?
+
+
+### Code changes
+
+<!-- REMOVE the items that are not applicable -->
+- Has exported function/method change
+- Has exported variable/fields change
+- Has interface methods change
+- Has persistent data change
+- No code
+
+### Check List for Tests
+
+This PR has been tested by at least one of the following methods:
+- Unit test
+- Integration test
+- Manual test (add detailed scripts or steps below)
+- No code
+
+### Side effects
+
+<!-- REMOVE the items that are not applicable -->
+- Possible performance regression, WHY: **TBD**
+- Increased code complexity, WHY: **TBD**
+- Breaking backward compatibility, WHY: **TBD**
+- No side effects
+
+### Related changes
+
+<!-- REMOVE the items that are not applicable -->
+- Need to cherry-pick to the release branch
+- Need to update the documentation
+- Need to be included in the release note
+- No related changes