📦 Project structure: PlatformIO configs, proper file extensions, wiring docs

- Rename .txt firmware files to proper extensions (.cpp, .ino, .py)
  so GitHub provides syntax highlighting and IDEs detect them correctly
- Add PlatformIO project configs (platformio.ini) for both Rocket and
  Launcher firmware with all library dependencies pinned, enabling
  one-command builds: `pio run -e rocket -t upload`
- Add requirements.txt for the Python telemetry dashboard
- Add .gitignore for PlatformIO, Arduino IDE, Python, and editor artifacts
- Add docs/WIRING.md with complete pin assignments, I2C addresses,
  servo calibration values, and UDP protocol reference
  (reverse-engineered from firmware source)
- Rename Simulation/fdsdf.png to OpenRocket_3D_View.png

No functional changes to any firmware or software code.

.gitignore

@@ -0,0 +1,34 @@
+# === PlatformIO ===
+.pio/
+.pioenvs/
+.piolibdeps/
+
+# === Arduino IDE ===
+build/
+*.elf
+*.bin
+*.hex
+*.map
+
+# === Python ===
+__pycache__/
+*.py[cod]
+*$py.class
+*.egg-info/
+dist/
+venv/
+.venv/
+env/
+
+# === IDE / Editor ===
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+Thumbs.db
+
+# === Fusion 360 recovery ===
+*.f3z.bak
+*.f3z.tmp