clangd issue -32001 invalid ast (#156)

* clangd error -32001 invalid ast

* added clangd autogenerated .cache dir to .gitignore

* added removal of .cache to clangd_clean command

* make clangd autogen .clangd file corrections

---------

Co-authored-by: recallmenot <edmund.raile@proton.me>

.gitignore

@@ -9,3 +9,5 @@
 minichlink/minichlink
 minichlink/minichlink.so
 compile_commands.json
+.clangd
+.cache

ch32v003fun/ch32v003fun.mk

@@ -52,9 +52,12 @@ gdbserver :
 clangd :
 	make clean
 	bear -- make build
+	@echo "CompileFlags:" > .clangd
+	@echo "  Remove: [-march=*, -mabi=*]" >> .clangd
 
 clangd_clean :
-	rm -f compile_commands.json
+	rm -f compile_commands.json .clangd
+	rm -rf .cache
 
 FLASH_COMMAND?=$(MINICHLINK)/minichlink -w $< $(WRITE_SECTION) -b