Add UTF string library #203

Job	Run time
changes	5s
[C++26] MSVC 2022 (Release) / Dependencies	38s
[C++23] GCC 14 (Debug) / Dependencies	18s
[C++26] MSVC 2026 (Debug) / Dependencies	35s
[C++23] Clang 21 (Release) / Dependencies	37s
[C++23] MSVC 2022 (Debug) / Dependencies	43s
[C++26] Clang 21 (Release) / Dependencies	32s
[C++23] MSVC 2026 (Debug) / Dependencies	34s
[C++23] GCC 14 (Release) / Dependencies	18s
[C++26] GCC 14 (Release) / Dependencies	20s
[C++26] MSVC 2022 (Debug) / Dependencies	35s
[C++23] MSVC 2026 (Release) / Dependencies	33s
[C++26] GCC 14 (Debug) / Dependencies	19s
[C++23] Clang 21 (Debug) / Dependencies	31s
[C++26] Clang 21 (Debug) / Dependencies	34s
[C++26] MSVC 2026 (Release) / Dependencies	33s
[C++23] MSVC 2022 (Release) / Dependencies	42s
[C++23] GCC 14 (Release) / iris	1m 6s
[C++23] GCC 14 (Debug) / iris	53s
[C++26] GCC 14 (Debug) / iris	53s
[C++26] GCC 14 (Release) / iris	1m 8s
[C++23] Clang 21 (Debug) / iris	1m 1s
[C++26] Clang 21 (Release) / iris	1m 23s
[C++23] MSVC 2026 (Release) / iris	1m 47s
[C++23] MSVC 2026 (Debug) / iris	1m 38s
[C++26] MSVC 2026 (Release) / iris	1m 44s
[C++26] Clang 21 (Debug) / iris	59s
[C++26] MSVC 2026 (Debug) / iris	1m 40s
[C++26] MSVC 2022 (Debug) / iris	1m 38s
[C++23] Clang 21 (Release) / iris	1m 32s
[C++26] MSVC 2022 (Release) / iris	1m 51s
[C++23] MSVC 2022 (Release) / iris	1m 45s
[C++23] MSVC 2022 (Debug) / iris	1m 36s
run-notifier	18s
	31m 19s

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