Add UTF string library #205

Job	Run time
changes	6s
[C++23] MSVC 2022 (Release) / Dependencies	36s
[C++23] Clang 21 (Debug) / Dependencies	37s
[C++23] Clang 21 (Release) / Dependencies	31s
[C++23] MSVC 2026 (Debug) / Dependencies	1m 53s
[C++26] MSVC 2022 (Debug) / Dependencies	37s
[C++26] Clang 21 (Debug) / Dependencies	35s
[C++23] MSVC 2022 (Debug) / Dependencies	42s
[C++26] GCC 14 (Release) / Dependencies	22s
[C++26] MSVC 2026 (Debug) / Dependencies	38s
[C++26] MSVC 2026 (Release) / Dependencies	36s
[C++23] GCC 14 (Release) / Dependencies	23s
[C++26] MSVC 2022 (Release) / Dependencies	37s
[C++26] GCC 14 (Debug) / Dependencies	20s
[C++23] GCC 14 (Debug) / Dependencies	23s
[C++23] MSVC 2026 (Release) / Dependencies	34s
[C++26] Clang 21 (Release) / Dependencies	33s
[C++26] GCC 14 (Debug) / iris	58s
[C++26] GCC 14 (Release) / iris	1m 13s
[C++23] GCC 14 (Debug) / iris	54s
[C++23] GCC 14 (Release) / iris	1m 9s
[C++23] Clang 21 (Release) / iris	1m 23s
[C++26] Clang 21 (Release) / iris	1m 22s
[C++23] MSVC 2026 (Release) / iris	1m 19s
[C++23] MSVC 2022 (Release) / iris	1m 22s
[C++26] Clang 21 (Debug) / iris	52s
[C++26] MSVC 2026 (Release) / iris	1m 21s
[C++26] MSVC 2022 (Debug) / iris	1m 15s
[C++26] MSVC 2022 (Release) / iris	1m 16s
[C++23] Clang 21 (Debug) / iris	1m 4s
[C++26] MSVC 2026 (Debug) / iris	1m 15s
[C++23] MSVC 2022 (Debug) / iris	1m 14s
[C++23] MSVC 2026 (Debug) / matrix.component	1s
run-notifier	1s
	28m 2s

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