Add clangd-related entries to .gitignore (qmk#31)

sigprof · web-flow · commit 35edec2998d4 · 2024-09-05T18:51:35.000+10:00
This is needed to support VS Code with clangd for userspace keymaps (in
this case `compile_commands.json` and `.cache/clangd` are located in the
`qmk_userspace` working copy).
diff --git a/.gitignore b/.gitignore
@@ -9,3 +9,8 @@
 *.hex
 *.bin
 *.uf2
+
+# clangd
+compile_commands.json
+.clangd/
+.cache/
