fix!: subpackage exports types

[userquin]

This PR includes:

• fixes subpackages exports, right now only proper types for bundler module resolutions (check screenshots below)
• adss typesVersions to resolve types for subpackes exports other than default for node10 module resolution
• includes .idea in .gitignore to exclude JetBrains IDE stuff (similar to .vscode folder)
• adds files to package.json to include only dist folder, we don't need 800KB of source code, you've the repo here (from +800KB to 260KB only)
• adds scripts/postbuild.mjs to add .js extension in dts files importing from dist folder and runs it in the build script

We can remove also the require entry in the default package exports since the build doesn't generate cjs files, the module using imports. Why do we need the ./dist/react-legacy/pwa-install.react-legacy.js in the package exports? This should be removed , importing from @khmyznikov/pwa-install/react-legacy should now work.

NOTE: you should check it before releasing it in some project to check if the changes in this PR works (I can check it using Vite in this repo https://github.com/sunflower-land/sunflower-land/blob/e42df72f13b17fd514e8953855c858ca79b464f4/src/features/pwa/PWAInstallProvider.tsx#L10).

Without this PR (https://arethetypeswrong.github.io/?p=%40khmyznikov%2Fpwa-install%400.4.8):

With this PR (run npm run build && npm pack in this PR and then upload the tgz file to https://arethetypeswrong.github.io/):

[userquin]

Working using Vite: check sunflower-land/sunflower-land#4987 (expand Install working on my local on my android phone (via usb))