Codebase cleaup

[SarangaR]

This PR is a full cleanup to the current Rust codebase. This is intended to remove dead code and missions, and swap necessary missions to be procedural where needed. Please add more things to the list below of stuff that needs to be removed/fixed.

Tasks:

• Remove Buoy mission + relevant parts
• Remove action-system based gate and coinflip missions + relevant parts
• Remove vision modules for dead missions
  • Buoy
  • Path PCA
• Remove gate/buoy targets in action context
• Fix compiler warnings (unused variables and code)