Add MBSE systems engineering documentation (Arcadia/Capella)

[nestor-g]

Summary

• Introduces a full 5-layer Arcadia/Capella MBSE structure for the JPL Open Source Rover, following the same methodology used on real Mars rover programs
• Adds 22 documentation pages covering the complete traceability chain from stakeholder needs → system functions → logical components → physical hardware → product breakdown
• Includes the Eclipse Capella 6.1.0 model scaffold (.capella, .aird, .afm) sourced from PhilCarPi/open-source-rover
• Updates mkdocs.yml with a full Systems Engineering nav section (22 pages)

Structure Added

systems_engineering/
├── 01_operational_analysis/   — Stakeholders, entities, activities, capabilities
├── 02_system_analysis/        — System functions, capabilities, missions, interfaces
├── 03_logical_architecture/   — 8 logical components (LC-01..LC-08), functions, interfaces
├── 04_physical_architecture/  — RPi/RoboClaw/PCB component specs, ROS node deployment map
├── 05_epbs/                   — Full BOM with suppliers and cost estimates (~$1,100–1,550)
└── MBSE_workspace/            — Capella 6.1.0 model files (machine-readable)

Test plan

• mkdocs build passes with zero new warnings (7 pre-existing warnings in repo are unaffected)
• All 22 systems engineering HTML pages rendered in _site/systems_engineering/
• Capella model files include valid XMI scaffold for all 5 Arcadia layers
• ReadTheDocs build passes on PR (automated)

🤖 Generated with Claude Code

[Achllle]

I'm new to MBSE so forgive my ignorance. What does this do for the OSR? How do we maintain this?