Ignore IDE-local files; make C2000Ware path portable in .cproject

.mcp.json and CLAUDE.md are auto-generated by CCS with machine-specific
absolute paths and shouldn't be shared via git. The .cproject change
(likely from a CCS reimport) replaces the hardcoded C2000Ware install
path with a variable reference.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitignore

@@ -5,3 +5,7 @@ Release/
 *.d_raw
 *.out
 *.map
+
+# IDE-generated, machine-specific (hardcoded local tool paths)
+.mcp.json
+CLAUDE.md