chore: modified the file structure of usecase diagram to implement the new way of antlr parsing

[omkarht]

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[codecov]

Codecov Report

❌ Patch coverage is 0.43165% with 1384 lines in your changes missing coverage. Please review.
✅ Project coverage is 3.41%. Comparing base (b715d82) to head (cfed700).

Files with missing lines	Patch %	Lines
...rc/diagrams/usecase/parser/antlr/UsecaseVisitor.ts	0.00%	430 Missing ⚠️
...c/diagrams/usecase/parser/antlr/UsecaseListener.ts	0.28%	349 Missing ⚠️
...diagrams/usecase/parser/antlr/UsecaseParserCore.ts	0.53%	185 Missing ⚠️
scripts/antlr-generate.mts	0.67%	147 Missing ⚠️
.../src/diagrams/usecase/parser/antlr/antlr-parser.ts	0.86%	115 Missing ⚠️
scripts/antlr-watch.mts	1.44%	68 Missing ⚠️
...grams/usecase/parser/antlr/UsecaseErrorListener.ts	0.00%	59 Missing ⚠️
.esbuild/server.ts	0.00%	22 Missing ⚠️
...ages/mermaid/src/diagrams/usecase/usecaseParser.ts	11.11%	8 Missing ⚠️
packages/parser/src/parse.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                          Coverage Diff                           @@
##           feat/usecase-diagram-implementation   #7160      +/-   ##
======================================================================
- Coverage                                 3.46%   3.41%   -0.05%     
======================================================================
  Files                                      492     495       +3     
  Lines                                    49127   49752     +625     
  Branches                                   749     751       +2     
======================================================================
+ Hits                                      1700    1701       +1     
- Misses                                   47427   48051     +624     

Flag	Coverage Δ
unit	3.41% <0.43%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/parser/src/language/index.ts	0.00% <ø> (ø)
packages/parser/src/parse.ts	1.63% <0.00%> (+0.16%)	⬆️
...ages/mermaid/src/diagrams/usecase/usecaseParser.ts	2.85% <11.11%> (+1.84%)	⬆️
.esbuild/server.ts	0.80% <0.00%> (-0.17%)	⬇️
...grams/usecase/parser/antlr/UsecaseErrorListener.ts	0.00% <0.00%> (ø)
scripts/antlr-watch.mts	1.44% <1.44%> (ø)
.../src/diagrams/usecase/parser/antlr/antlr-parser.ts	0.86% <0.86%> (ø)
scripts/antlr-generate.mts	0.67% <0.67%> (ø)
...diagrams/usecase/parser/antlr/UsecaseParserCore.ts	0.53% <0.53%> (ø)
...c/diagrams/usecase/parser/antlr/UsecaseListener.ts	0.28% <0.28%> (ø)
... and 1 more

... and 4 files with indirect coverage changes

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Build	Status	Details	Updated (UTC)
default (Inspect)	⚠️ Changes detected (Review)	27 added	Nov 14, 2025, 1:16 PM