[feat] Make mtb's entry point static

[melMass]

Describe the problem

In b541670a5b389d9bdef2b70e190294b8a8a2facf I started to remove some of mtb's side effects but there is still way too much. Most of what happens in init: doc association from the wiki, dynamic imports from __nodes__ array in ./nodes/*.py etc)

Describe the solution you'd like

Most of it can be migrated to a script generating that statically and reducing start time even further. Dynamic imports are probably still needed to allow some nodes to fail

Alternatives considered

No response

Additional context

No response