chore: align .gitignore with upstream arduino-pico

- Remove IDE-specific patterns (.idea/)
- Remove build system patterns (.pio/)
- Remove project-specific patterns (.qodo/)
- Keep only core build and artifact patterns

Moving IDE and user-specific ignores to .git/info/exclude for cleaner repository

Author: Goran Miskovic

.gitignore

@@ -8,7 +8,3 @@ ota/build-rp2350-riscv
 tools/libpico/build*/
 tools/libpico/boot/
 platform.local.txt
-.qodo/
-.pio/
-.idea/
-.vscode/