Build

Add .cache to gitignore, created by clangd #691

Job	Run time
check_format	26s
build (ubuntu-20.04, Release)	2m 47s
build-android (Release, arm64-v8a)	1m 9s
build (ubuntu-20.04, Debug)	4m 50s
build-android (Release, armeabi-v7a)	53s
build-android (Release, x86_64)	58s
build-android (Debug, arm64-v8a)	1m 1s
build (windows-2019, Release)	4m 33s
build-android (Debug, armeabi-v7a)	49s
build (windows-2019, Debug)	4m 29s
build-android (Debug, x86_64)	44s
build (macos-13, Release)	4m 0s
build (macos-13, Debug)	4m 49s
build (macos-14, Release)	3m 6s
build (macos-14, Debug)	4m 50s
	39m 24s

Provide feedback