Add UTF string library #200

Job	Run time
changes	5s
[C++26] MSVC 2022 (Debug) / Dependencies	40s
[C++23] GCC 14 (Release) / Dependencies	18s
[C++23] Clang 21 (Debug) / Dependencies	35s
[C++26] MSVC 2026 (Release) / Dependencies	34s
[C++26] GCC 14 (Release) / Dependencies	20s
[C++26] MSVC 2026 (Debug) / Dependencies	42s
[C++23] MSVC 2022 (Release) / Dependencies	52s
[C++26] Clang 21 (Release) / Dependencies	33s
[C++23] GCC 14 (Debug) / Dependencies	21s
[C++26] GCC 14 (Debug) / Dependencies	21s
[C++23] MSVC 2026 (Release) / Dependencies	36s
[C++23] MSVC 2026 (Debug) / Dependencies	36s
[C++26] MSVC 2022 (Release) / Dependencies	39s
[C++23] Clang 21 (Release) / Dependencies	35s
[C++23] MSVC 2022 (Debug) / Dependencies	42s
[C++26] Clang 21 (Debug) / Dependencies	35s
[C++23] GCC 14 (Release) / iris	1m 12s
[C++26] GCC 14 (Release) / iris	1m 7s
[C++23] GCC 14 (Debug) / iris	58s
[C++26] GCC 14 (Debug) / iris	52s
[C++26] Clang 21 (Release) / iris	1m 28s
[C++26] MSVC 2026 (Release) / iris	1m 44s
[C++26] Clang 21 (Debug) / iris	1m 0s
[C++23] Clang 21 (Debug) / iris	57s
[C++23] MSVC 2026 (Release) / iris	1m 45s
[C++23] Clang 21 (Release) / iris	1m 35s
[C++23] MSVC 2026 (Debug) / iris	1m 39s
[C++26] MSVC 2022 (Debug) / iris	1m 42s
[C++26] MSVC 2022 (Release) / iris	1m 44s
[C++26] MSVC 2026 (Debug) / iris	1m 42s
[C++23] MSVC 2022 (Debug) / iris	1m 43s
[C++23] MSVC 2022 (Release) / iris	1m 39s
run-notifier	15s
	32m 6s

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