feat(error): add umbrella header #5

Job	Run time
static analysis (linux)	27s
valgrind (linux)	21s
build and test (windows-2022 / msvc / Debug)	38s
build and test (ubuntu-24.04 / gcc / Release)	23s
build and test (ubuntu-24.04 / gcc / Debug)	24s
build and test (ubuntu-24.04 / clang / Debug)	23s
build and test (macos-15-intel / clang / Release)	1m 56s
build and test (windows-2022 / msvc / Release)	29s
build and test (macos-14 / clang / Debug)	59s
error cross platform summary	-1s
	5m 59s

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