Resolve module to full implementation

[niksy]

This is useful so we can:

• skip special Webpack configuration for ESM configuration
• remove special behavior for @rollup/plugin-node-resolve and browser entries

Use browser field resolving for specific modules (e.g. Browserify module such as process use browser field) and for other rely on main/module/exports.

[niksy]

There are module which have multiple browser-specific entries so this can potentially be harmful.

[niksy]

Consider using enhanced-resolve for this.