PlatformIO with Neovim

Thank you very much! This was very helpful.

Additionally I had to:

• add $HOME/.platformio/packages/toolchain-xtensa-esp32s3/bin to my $PATH
• add to script: sed -i 's/-mlongcalls//' compile_commands.json sed -i 's/-fno-tree-switch-conversion//' compile_commands.json sed -i 's/-fstrict-volatile-bitfields//' compile_commands.json