feat: implement tagChildrenIndent options in indent

[yeonjuan]

• fixes [indent] - Feature request - Allow HTML, HEAD and BODY to be on same level #101
• implement option
• documentation

[codecov]

Codecov Report

Attention: Patch coverage is 97.95918% with 1 line in your changes missing coverage. Please review.

Project coverage is 98.27%. Comparing base (fb97ff0) to head (f775902).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/eslint-plugin/lib/rules/indent/indent.js	97.61%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #248      +/-   ##
==========================================
+ Coverage   98.19%   98.27%   +0.08%     
==========================================
  Files          59       59              
  Lines        1604     1623      +19     
  Branches      423      432       +9     
==========================================
+ Hits         1575     1595      +20     
+ Misses         29       28       -1     

Flag	Coverage Δ
unittest	98.27% <97.95%> (+0.08%)	⬆️

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Files with missing lines	Coverage Δ
packages/eslint-plugin/lib/rules/utils/node.js	94.54% <100.00%> (+0.20%)	⬆️
packages/template-parser/lib/template-parser.js	100.00% <100.00%> (ø)
packages/template-parser/lib/traverser.js	100.00% <100.00%> (ø)
packages/eslint-plugin/lib/rules/indent/indent.js	99.36% <97.61%> (+0.77%)	⬆️