Devcontainer support, update instructions and environment

[SergioGasquez]

Hi! Thanks for your effort in bringing Rust to the MCH Badge! Here is a PR that includes:

• Adds devcontainer support to bootstrap the environment (we can even develop ESP boards in Rust in a browser app without installing anything 🤯 )
  • Devcontainers in VsCode
  • Gitpod:
    • The button on the readme would need to be updated if this PR gets merged as it's currently pointing to my fork
  • GitHub Codespaces
• Wokwi simulation: Since the board was already in Wokwi I was able to use it and simulate Rust code on it, using wokwi-server.
  • Wokwi also supports GDB debugging, so I included launch.json with the necessary configuration to debug the project from devcontainers
• Add some task to build, and run Wokwi simualtions from devcontainers
• Add some task to build and flash from host machine
• Updated the readme:
  • Updated installation commands
    • We don't need rustup override set esp as we have rust-toolchain.toml specifying our channel
    • You can install esp-idf while installing Xtensa Rust toolchain, which will avoid downloading the whole internet while building the project for the first time, and can also be reused in other projects (the other way your would end up having the whole internet several times on your machine, which eats a lot of space)
      • Deleted .embuild directory (is where esp-idf gets downloaded if you don't have it installed and activated)
    • There is an argument on Xtensa installer which creates an export file, which you can later source to setup all the environment variables required.
  • Devcontainers documentation

[p2mate]

I think all these approaches would remove the launcher program provided with the badge?

[SergioGasquez]

Hello @p2mate! Sorry for the late reply, I was ooo. You are correct, just deleted this paragraph!