chore(deps): remove tsx dependency and use Node native TypeScript execution

[sabertazimi]

Summary

Remove tsx and ts-node dependencies, leveraging Node v24's native TypeScript support (--experimental-strip-types).

Changes

• Remove tsx from root and packages/bod devDependencies
• Replace tsx with node in all script entries (badge, canary, release, dev)
• Add "type": "module" to root package.json for ESM detection
• Change .js import extensions to .ts across all source and test files (Node native TS doesn't rewrite .js → .ts)
• Replace __dirname with import.meta.dirname in scripts
• Add esbuild for JS bundling in packages/bod; tsc now emits declarations only
• Update bin/bod.js from require() to import (ESM compatibility)
• Bump engines.node from >=18.0.0 to >=24.0.0 in all 4 package.json files
• Update AGENTS.md docs to reflect Node >=24 requirement

Test plan

• pnpm build — all packages compile successfully
• pnpm vitest run — 29/29 tests pass
• pnpm dev --help — CLI runs via node ./src/bod.ts
• node scripts/badge.ts — root scripts execute correctly
• node packages/bod/bin/bod.js --help — compiled binary works
• tsc --noEmit — type checking passes

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	dotenv@​17.4.2

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.63%. Comparing base (870b7b6) to head (d664cbf).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1525      +/-   ##
==========================================
- Coverage   93.58%   83.63%   -9.96%     
==========================================
  Files           5        5              
  Lines          78       55      -23     
  Branches       13        6       -7     
==========================================
- Hits           73       46      -27     
  Misses          4        4              
- Partials        1        5       +4     

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