feat(skills): Create TypeScript conversion skills (Group 1)

## Summary

Create language conversion skills for TypeScript source conversions:

- [ ] `lang-convert-typescript-rust-dev` - TypeScript to Rust
- [ ] `lang-convert-typescript-python-dev` - TypeScript to Python
- [ ] `lang-convert-typescript-golang-dev` - TypeScript to Go

## Context

Part of the language conversion skills initiative. These skills help Claude assist with code migration between languages by providing:
- Syntax mapping tables
- Idiom translations
- Common pattern conversions
- Library equivalents

## Implementation

Each skill will be created using `/create-lang-conversion-skill` command and should leverage:
- `lang-typescript-dev` (source language)
- Target language skills (`lang-rust-dev`, `lang-python-dev`, `lang-go-dev`)
- Cross-cutting pattern skills (`patterns-serialization-dev`, `patterns-concurrency-dev`, etc.)

## Acceptance Criteria

- [ ] All three conversion skills created with proper structure
- [ ] Each skill has comprehensive syntax mapping
- [ ] PRs opened and linked to this issue