enhance(frontend): CWの注釈で入力済みの文字数を表示する

[claustra01]

What

CWの注釈で入力済みの文字数を表示する。また、100文字を超えている場合、投稿ボタンを非アクティブにする。

Why

Fix #15066
Fix #12621

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[claustra01]

このように表示されます:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 19.35%. Comparing base (dd56623) to head (86ede8c).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop   #15070       +/-   ##
============================================
- Coverage    39.96%   19.35%   -20.61%     
============================================
  Files         1563      728      -835     
  Lines       197744   103834    -93910     
  Branches      3631      991     -2640     
============================================
- Hits         79024    20100    -58924     
+ Misses      118115    83180    -34935     
+ Partials       605      554       -51     

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