Migrate code into dedicated repo(s) for Substrate module

[nuke-web3]

This repo should include only student-facing slides and instructor-facing notes on how to run the show :teacher:

Looks like these are the only code examples we should move out into either a monorepo for the module, or if intended to be packaged and shared independently in separate repo(s):

• [x] syllabus/4-Substrate/frameless-node-template
  • https://github.com/Polkadot-Blockchain-Academy/PBA2-BA-frameless-node-template and or https://github.com/Polkadot-Blockchain-Academy/UNGRADED-frameless-node-template-PBA-BA-2023-to-delete are more updated IIRC than what exists in the content repo here.
• [x] syllabus/4-Substrate/wasm-crate
• [x] syllabus/4-Substrate/wasm-crate-bin
• [x] #857

[wirednkod]

I do not think this needs to be still open. @kianenigma can you elaborate please?