chore: Goodbye gulp

[woxtu]

What

glupのタスクをJavaScriptのビルドスクリプトに置き換えてみます。

Why

Resolve #9575.

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

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.10% ⚠️

Comparison is base (dc1a91a) 78.85% compared to head (b148f9f) 78.75%.
Report is 1 commits behind head on develop.

❗ Current head b148f9f differs from pull request most recent head 756bcae. Consider uploading reports for the commit 756bcae to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #11447      +/-   ##
===========================================
- Coverage    78.85%   78.75%   -0.10%     
===========================================
  Files          176      921     +745     
  Lines        22934    97545   +74611     
  Branches       511     7730    +7219     
===========================================
+ Hits         18084    76821   +58737     
- Misses        4850    20724   +15874     

see 767 files with indirect coverage changes

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[syuilo]

👍🏻