fix: gitignore autogenerated files and the external libs

CMakeUserPresets.json contains user (i.e. per developer) presets and
should therefore be ignored.

node_modules and so on is just for the lv_font_conv dependency.

Author: sillydan1

.gitignore

@@ -50,3 +50,13 @@ src/arm-none-eabi
 
 # clangd
 .cache/
+
+# Toolchain and External dependencies
+sdk-toolchain/
+
+# Developer files
+CMakeUserPresets.json
+compile_commands.json
+package-lock.json
+package.json
+node_modules/