.clang-tidy: Add basic .clang-tidy for identifier naming #2299

Job	Run time
Create source package	1m 36s
Build for macOS (x86_64, Debug)	3m 54s
Build for macOS (x86_64, Release)	6m 33s
Build for macOS (arm64, Debug)	3m 25s
Build for Windows (Debug) on Ubuntu	3m 10s
Build for Ubuntu (Debug)	3m 54s
Build for Windows (Release) on Ubuntu	4m 26s
Build for macOS (arm64, Release)	6m 15s
Build for Ubuntu (Release)	4m 8s
Generate PDB for Windows (Debug)	38s
Generate PDB for Windows (Release)	24s
Build macOS Universal Bundle (debug)	28s
Build macOS Universal Bundle (release)	22s
Release	0s
Push to PPA Snapshot Branch	0s
	39m 13s

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