feat: simplify

[k11kirky]

TLDR

Simplified PostHog enricher initialization and improved API ergonomics by removing manual setup requirements and adding file parsing capabilities.

Changes

• Removed manual initialization: Grammar files are now bundled and auto-located at runtime, eliminating the need to call initialize() or specify WASM directory paths
• Added file parsing: New parseFile() method automatically detects language from file extensions and reads files directly
• Improved property naming: Renamed enrichedFlags and enrichedEvents to flags and events for cleaner API
• Enhanced comment formatting: Removed restriction that limited one comment per source line
• Updated documentation: Revised README examples to reflect the simplified API and new capabilities
• Added language detection: Exported EXT_TO_LANG_ID mapping for file extension to language ID conversion

[k11kirky]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• feat: simplify #1589 👈 (View in Graphite)
• feat: refactor + improve stability #1585
• feat: improve tests, fix cache and fix package #1566
• feat: Break up god class #1565
• feat: Extract helpers #1564
• feat(code): port posthog detection logic to new pkg #1562
• main

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