fix: added missing typescript-tsx-esm-import files (#92)

packages/typescript-tsx-esm-import/.gitignore

@@ -0,0 +1,2 @@
+node_modules
+lib

packages/typescript-tsx-esm-import/.mocharc.json

@@ -0,0 +1,4 @@
+{
+  "extension": ["ts"],
+  "spec": "src/**/*.spec.ts"
+}

packages/typescript-tsx-esm-import/README.md

@@ -0,0 +1,16 @@
+# TypeScript with `tsx` Loader
+
+A standalone project showing TypeScript source files transpiled on-the-fly with [`--import tsx`](https://tsx.is/node) as a Node ECMAScript Modules importer.
+
+```shell
+npm i
+npm run test
+```
+
+Note that the `tsconfig.json` file has `compilerOptions`:
+
+- `"noEmit": true`: as there's no need to transpile `.ts` files on disk to `.js` files on disk before running these tests
+- `"module": "ESNext`: indicating code should be transpiled in-memory as ESM
+
+Additionally, `package.json` has `"type": "module"`.
+If it didn't, TypeScript source files would need the `.mts` extension.