Add CLion PlatformIO build configuration

- Add .clion.ini to configure PlatformIO as default environment
- Add CLION_BUILD.md with build instructions for CLion users
- Update .gitignore to exclude compile_commands.json

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.clion.ini

@@ -0,0 +1,2 @@
+[platformio]
+init_default_env = tasmota

.gitignore

@@ -58,3 +58,4 @@ lib/libesp32/berry/berry
 ## Python virtual environments for Platformio ##
 venv
 .venv
+compile_commands.json

CLION_BUILD.md

@@ -0,0 +1,60 @@
+# Building Tasmota in CLion with PlatformIO
+
+## Setup Complete
+
+PlatformIO CLI has been installed and configured for this project.
+
+## Building from CLion Terminal
+
+Use the embedded terminal in CLion (View → Tool Windows → Terminal) or any terminal:
+
+### List all available environments:
+```bash
+pio run --list-targets
+```
+
+### Build a specific environment:
+```bash
+pio run -e tasmota          # Build standard tasmota for ESP8266
+pio run -e tasmota32        # Build for ESP32
+pio run -e tasmota-minimal  # Build minimal version
+```
+
+### Clean build:
+```bash
+pio run -e tasmota -t clean
+```
+
+### Upload to device:
+```bash
+pio run -e tasmota -t upload
+```
+
+### Monitor serial output:
+```bash
+pio device monitor
+```
+
+## Code Intelligence
+
+The `compile_commands.json` file has been generated for CLion to provide proper code completion and navigation.
+
+To regenerate after configuration changes:
+```bash
+pio run -t compiledb -e tasmota
+```
+
+## Available Environments
+
+See `platformio.ini` for the full list of build environments. Common ones include:
+- `tasmota` - Standard ESP8266 build
+- `tasmota32` - Standard ESP32 build
+- `tasmota-sensors` - Build with sensor support
+- `tasmota-display` - Build with display support
+- `tasmota-ir` - Build with IR support
+
+## Notes
+
+- CLion will use CMake for code indexing, but actual builds use PlatformIO
+- The CMakeLists.txt files are for ESP-IDF builds (alternative build system)
+- For this project, always use `pio` commands for building