Enable Sourcemap Output

[abimaelmartell]

This pull request adds robust support for source map generation in the bundling process, allowing users to choose between inline, external, or no source maps. It updates the CLI and internal APIs to handle these options, ensures correct file outputs, and introduces comprehensive tests to verify the new functionality.

Source map support in bundling:

• Enhanced the bundle function to accept a sourcemap option (inline, external, or none) and return both the bundled code and, if applicable, the source map. The implementation writes external source maps to a temporary file due to esbuild limitations. [1] [2]
• Updated all usages of the bundle function across the codebase to handle the new return type and options, including CLI commands and tests. [1] [2] [3] [4] [5]

CLI improvements:

• Extended the bundle CLI command to accept a --sourcemap option, validated its value, and handled writing external source map files alongside the bundle output. Updated help and examples accordingly.

Testing:

• Added a new test suite (tests/bundle/sourcemap.test.ts) with thorough coverage for all source map options, including validation of inline/external maps, bundle size comparisons, and platform compatibility.

Other updates:

• Minor refactor in example usage to use the correct middleware factory function.