Fix TypeScript SDK tooling: replace Bun with npm, add tsup for publishing

[Copilot]

The ts/ package was wired for Bun — noEmit: true meant tsc produced nothing, moduleResolution: "bundler" was Node-incompatible, and no exports/types/files fields existed for npm publishing.

Changes

• Remove bun.lock — package-lock.json is the single source of truth
• Add tsup as build tool (tsup.config.ts); replaces raw tsc for compilation:
  • Emits ESM to dist/
  • Generates .d.ts declarations
  • Bundles @code0-tech/tucana/helpers inline (that package ships a .ts helper with no compiled counterpart, requiring bundler-side resolution)
• Fix package.json:
  • Rename "ts" → "@code0-tech/hercules"
  • Add main, module, types, exports, files for correct npm publish shape
  • build → tsup, add typecheck script (tsc --noEmit), drop unused ts-node
• Fix tsconfig.json: remove noEmit, add declaration, declarationMap, sourceMap
• Fix imports in action_sdk.ts: add missing .js extensions to 6 package subpath imports for consistent module resolution
• Update README.md: replace bun install / bun with npm install / npx tsx

After these changes, npm run build produces:

dist/action_sdk.js      # compiled ESM
dist/action_sdk.js.map  # sourcemap
dist/action_sdk.d.ts    # type declarations

And npm pack correctly bundles only dist/ + README.md + package.json.

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