chore: remove a stray coverage profile and ignore *.profraw

default.profraw was committed by accident in 73f0576 (a formatting commit) and shipped in the 0.3.0 tag. Ignore *.profraw so a test run that leaves one in the working directory can't be committed again.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: esnunes

.gitignore

@@ -5,3 +5,5 @@
 Fixtures/UITests/Derived
 Fixtures/UITests/*.xcodeproj
 Fixtures/UITests/*.xcworkspace
+# Written to the working directory by an instrumented binary run without LLVM_PROFILE_FILE.
+*.profraw