chore: esm only

[dopry]

!BREAKING CHANGE:

[Copilot]

Pull Request Overview

This PR transitions the project from a dual CommonJS/ESM build setup to ESM-only, representing a breaking change that simplifies the build configuration and modernizes the package structure.

• Removes dual build system and related TypeScript configurations
• Updates package.json to specify "type": "module" and consolidates entry points
• Replaces CommonJS module detection pattern with ESM equivalent using import.meta.url

Reviewed Changes

Copilot reviewed 9 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tsconfig.test.json	Removed test-specific TypeScript configuration
tsconfig.mjs.json	Removed ESM-specific TypeScript configuration
tsconfig.cjs.json	Removed CommonJS-specific TypeScript configuration
src/index.ts	Updated module detection from require.main to import.meta.url pattern
package.json	Set module type to ESM, updated build scripts, and replaced ts-node with tsx
fixup.sh	Removed build script that created dual package.json files
.eslintrc	Minor formatting cleanup and removed mocha environment
.cfignore	Removed Cloud Foundry ignore file
.babelrc	Removed Babel configuration

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[Copilot]

The condition import.meta.url.startsWith("file:") is unnecessary since import.meta.url will always be a file: URL in Node.js when running local files. The logic should be simplified to just check if the resolved module path matches process.argv[1].

Suggested change

	if (import.meta.url.startsWith("file:")) {
	const modulePath = url.fileURLToPath(import.meta.url);
	// Compare the module's path to the path of the main module being executed
	// This approach might need adjustments for symbolic links or specific execution contexts
	if (process.argv[1] === modulePath) {
	// This code block will execute only when the ESM module is run directly
	main();
	}
	const modulePath = url.fileURLToPath(import.meta.url);
	// Compare the module's path to the path of the main module being executed
	// This approach might need adjustments for symbolic links or specific execution contexts
	if (process.argv[1] === modulePath) {
	// This code block will execute only when the ESM module is run directly
	main();