[Chore]: Repository Cleanup & Documentation

[majockbim]

With the upcoming hardware iteration and planned exposure, the repository needs to be cleaned up and properly documented, which motivated this issue.

The repository currently contains redundant files from the initial 36-hour hackathon build under the old name "Strokr".

Milestones

• Remove redundant files and clean up messy prototype code
• Update repository references from "Strokr" to "Physio"
• Add a detailed hardware breakdown section for the V2 custom board
• Add PCBWay sponsorship section and link(s) prominently in the README
• Draft a placeholder section for the PCBWay experience review ← to be updated once the boards arrive
• Prepare post drafts for exposure