PR/02 - CI Build fixes - Fix JS notebook entrypoints and improve test run output

[sassdawe]

This pull request introduces several improvements to the build and test infrastructure, focusing on better output path handling when Arcade is disabled, and more reliable and organized test result logging. The changes also update TypeScript and Rollup build steps for the browser and core packages to ensure the correct input files are used after compilation.

Build and Output Path Handling:

• Added a conditional property group in Directory.Build.props to replicate Arcade's output directory structure (artifacts/bin/<ProjectName>/<Configuration>) when Arcade is disabled, ensuring that dotnet test --no-build can locate the correct assemblies.

Test Infrastructure Improvements:

• Enhanced test-retry-runner.ps1 to generate unique, safe, and descriptive .trx test result filenames for each test run and retry, preventing filename collisions and making test results easier to analyze. This includes the addition of a helper function to sanitize filenames. [1] [2] [3]

Build Script Updates:

• Updated the compile and rollup scripts in src/polyglot-notebooks-browser/package.json to ensure TypeScript compilation runs before bundling and to use the compiled JavaScript as input for Rollup, improving build reliability.
• Modified the compile-es-module and compile-library scripts in src/polyglot-notebooks/package.json to use compiled output from dist as input for bundling, aligning with best practices for build pipelines.