[Improve] add issue forms

[ly015]

Motivation

Add issue forms to replace original templates. The effect and usage of the issue form can be viewed in mmediting.

Modification

BC-breaking (Optional)

Use cases (Optional)

Checklist

Before PR:

• I have read and followed the workflow indicated in the CONTRIBUTING.md to create this PR.
• Pre-commit or linting tools indicated in CONTRIBUTING.md are used to fix the potential lint issues.
• Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• New functionalities are covered by complete unit tests. If not, please add more unit tests to ensure correctness.
• The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

• CLA has been signed and all committers have signed the CLA in this PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.19%. Comparing base (8c58a18) to head (2c799ff).
Report is 14 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1778   +/-   ##
=======================================
  Coverage   84.19%   84.19%           
=======================================
  Files         241      241           
  Lines       21041    21041           
  Branches     3741     3741           
=======================================
  Hits        17716    17716           
  Misses       2403     2403           
  Partials      922      922           

Flag	Coverage Δ
unittests	84.10% <ø> (ø)

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