feat: add new directives plugin

[lxsmnsyc]

This PR intends to replace the current directives plugin (TanStack) with our own.

Features:

• shorter function ids
  • previous plugin used SHA, which produced a very long id. The new one has shorter length (around 8 characters as uid) and has a descriptive name for easier debugging.
• API change
  • previously we only required createServerReference. This limited the server functions for only top-level declaration. The new plugin now allows inner declarations via cloning (this introduces a new API called cloneServerReference), so now the server functions are able to be registered ahead of time while deferring the actual instance in the exact time it is declared by intention.
  • the previous manifest mechanism is deprecated by server preloading. The plugin keeps track which files has the server functions and then preloads those ahead of time. The function lookup is now done through a map so we don't need to do some dynamic imports. Not sure of the repercussions but there shouldn't be any issues.
• backwards compatibility
  • should still retain the required features
• proper treeshaking
  • previous plugin didn't remove some code from a module with a module-level directive. The new one creates an entirely new module from scratch.
• aliasing
  • the new plugin can now keep track if the server function is exported by alias, so it will be able to retain the export.

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