Build/bundle all javascript code and stop using npm on servers

[knazarov]

Currently we don't properly build some of the javascript code into redistributable files, and because of this we have to execute npm on servers in order to start things like block explorer.

This has historically led to problems with instability of npm itself and breakages of ansible provisioning. Even though we've transitioned to pnpm and fixed some of the instabilities, it's still a good idea to pre-build everything.

The block explorer has already been ported, and what's left is:

• docs_ai_backend
• ansible (running the pre-built binaries)

[ekumamatthew]

Can I work on this, please?

[ukorvl]

Infra is fully migrated to use bundled code.