refactor: use OpenAPI file path for generator instead of stdin & modernize generator-cli

[Lodin]

This pull request includes significant updates to both the Java and TypeScript codebases, focusing on improving the GeneratorProcessor and GeneratorIO functionalities. The most important changes include the use of direct read of an OpenAPI file instead of copying it to stdin, refactoring the TypeScript generator CLI to use URLs, and updating the test suite to reflect these changes.

Java Changes:

• GeneratorProcessor Enhancements:
  • Used a OpenAPI file name path as an CLI argument instead of copying it to stdin. (packages/java/engine-core/src/main/java/com/vaadin/hilla/engine/GeneratorProcessor.java)

TypeScript Changes:

• GeneratorIO Refactoring:

  • Updated GeneratorIO to use URL instead of string paths for file operations. (packages/ts/generator-cli/src/GeneratorIO.ts) [1] [2]

• CLI Improvements:

  • Refactored the CLI to use parseArgs for argument parsing and removed meow. (packages/ts/generator-cli/src/index.ts)
  • Removed the processInput utility function and updated the CLI to accept the input file path to read it directly. (packages/ts/generator-cli/src/index.ts)

• Testing Enhancements:

  • Updated tests to reflect changes in GeneratorIO and added new tests for the CLI. (packages/ts/generator-cli/test/GeneratorIO.spec.ts, packages/ts/generator-cli/test/cli.spec.ts) [1] [2]
  • Added a new test plugin for better test coverage. (packages/ts/generator-cli/test/TestPlugin.ts)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 4 lines in your changes missing coverage. Please review.

Project coverage is 86.91%. Comparing base (881f960) to head (10c1100).

Files with missing lines	Patch %	Lines
packages/ts/generator-cli/src/GeneratorIO.ts	91.66%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3214   +/-   ##
=======================================
  Coverage   86.91%   86.91%           
=======================================
  Files         118      118           
  Lines        8191     8178   -13     
  Branches     1256     1256           
=======================================
- Hits         7119     7108   -11     
+ Misses       1058     1056    -2     
  Partials       14       14           

Flag	Coverage Δ
unittests	86.91% <91.66%> (+<0.01%)	⬆️

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