Add .gitattributes file #63

Job	Run time
Building MythTV on macOS 12 (Monterey) x86_64 using clang	1h 10m 59s
Building MythTV on Ubuntu interim	5m 42s
Building MythTV on macOS 13 (Ventura) x86_64 using clang	1h 17m 23s
Building MythTV on Ubuntu LTS	5m 47s
Building MythTV on macOS 14 (Sonoma) x86_64 using clang	1h 43m 49s
Building MythTV on Ubuntu devel	5m 49s
Building MythTV on macOS 14 (Sonoma) arm64 using clang	33m 15s
Building MythTV on Debian stable	5m 50s
Building MythTV on Fedora	5m 16s
Building MythTV on Fedora - Qt6	10m 6s
Building MythTV on Fedora - clang	6m 40s
Building MythTV on Fedora - CMake	4m 14s
	5h 34m 50s

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