Rewrite full documentation to VitePress

[Shinigami92]

Rewrite the full documentation to VitePress.

Needs to be done after a major bump to v8, cause we need to use "type": "module" / esm

[brenoepics]

Hi @Shinigami92, I can do this, for the type module, we can just use config.mts and keep the type as common js or is v8 going to use type module for the pg migrate itself?

[Shinigami92]

v8 will switch to "type": "module" for the whole node-pg-mirgate codebase!

But anyway, if you would like to start converting the docs from docsify to vitepress, this would be an awesome help!

Maybe we can somehow server a compatibility until we switch fully to v8 as you suggested with a config.mts.