Sync edgetx to Gitea

docs/index.md

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+# EdgeTX Developer Documentation
+
+Welcome to the EdgeTX developer documentation!
+
+![EdgeTX Logo](assets/images/EdgeTX_logo.png)
+
+EdgeTX is an open-source firmware for RC radio transmitters. This documentation covers technical topics for developers and contributors: how to build EdgeTX from source, hardware reference material, hardware modification guides, and internal software architecture.
+
+## What's in this documentation
+
+- **Contributing** — Getting started with Git, the GitHub workflow, and a command reference for common Git operations.
+- **Building EdgeTX** — Step-by-step build instructions for every supported platform (Linux, macOS, Windows, Docker, and GitHub CodeSpaces), plus a reference for all CMake compilation options.
+- **Hardware Reference** — Radio hardware specifications, DMA mappings and IRQ usage tables for specific radios.
+- **Hardware Mods** — Community hardware modification guides for FlySky gimbals, FRM303 module, PL18 / Paladin EV, NB4+, and radio recovery (unbricking).
+- **Development** — Internal architecture documentation covering CLI commands, customisable switches, control inputs, external module protocols, YAML storage, and mixer synchronisation.
+
+## Quick links
+
+| Section | Description |
+|---|---|
+| [Contributing](contributing/getting-started-with-git.md) | Start here if you are new to Git or GitHub |
+| [Building — CodeSpaces](building/codespaces.md) | Build in a web browser with no local setup |
+| [Building — Linux (Ubuntu 24.04)](building/linux-ubuntu-24.04.md) | Recommended local build environment |
+| [Building — Windows](building/windows.md) | Native Windows build using Visual Studio + Ninja |
+| [Unbrick your radio](troubleshooting/unbrick.md) | Recover from a failed flash using STM32CubeProgrammer |
+| [Radio Specifications](hardware/radio-specs.md) | Hardware specs for supported radios |