web uiの追加

[mazrean]

ブラウザでグラフを見れるようにした。
また、webuiではノードをクリックすることでサブグラフを表示できるようにしている。

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 217 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (60abc71) to head (5315316).

Files with missing lines	Patch %	Lines
internal/ui/render.go	0.00%	121 Missing ⚠️
internal/ui/mermaid.go	0.00%	62 Missing ⚠️
main.go	0.00%	21 Missing ⚠️
internal/pkg/list/queue.go	0.00%	8 Missing ⚠️
dbdoc/dbdoc.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##            main     #37    +/-   ##
======================================
  Coverage   0.00%   0.00%            
======================================
  Files         13      14     +1     
  Lines        863     971   +108     
======================================
- Misses       863     971   +108     

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