Convert TiaCodegen-ts to ESM: add .js extensions to all imports/exports

[Copilot]

The TypeScript library needs to be consumable as a native ESM module. This requires .js extensions on all relative imports/exports in compiled output and switching from CommonJS to NodeNext module resolution.

Changes

• tsconfig.json: module → NodeNext, moduleResolution → NodeNext, added isolatedModules: true
• package.json: Added "type": "module", exports field, updated Jest config to ts-jest/presets/default-esm with moduleNameMapper for .js→.ts test resolution, updated test script to use --experimental-vm-modules
• All src/ files: Added .js to every relative import/export specifier
• src/index.ts: Changed interface re-exports to export type (required by isolatedModules)
• src/Commands/BaseOperationOrSignal.ts: Removed circular imports of And/Or that worked under CommonJS lazy resolution but cause TDZ errors in ESM. Replaced instanceof And/Or with constructor.name checks since neither class has subclasses

// Before (CommonJS only — circular imports hoisted in ESM cause TDZ errors)
import { And } from './And.js';
import { Or } from './Or.js';
if (this instanceof And || this instanceof Or) { ... }

// After (ESM-safe)
const name = this.constructor.name;
if (name === 'And' || name === 'Or') { ... }

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add .js to all imports/exports in typescript</issue_title>
<issue_description>We want to use the library directly as ESM lib.
So all the import and exports need a file extension.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add .js to all imports/exports in typescript #31

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