Add initial support for UTF-8 text input #9173

Job	Run time
Code style check / Code style check	5s
MSVC / MSVC (SDL2 x86)	4m 14s
Clang Analyzer / Clang Analyzer	10m 0s
MSVC / MSVC (SDL2 x64)	4m 0s
IWYU / IWYU	4m 57s
SonarCloud Analyzer / SonarCloud Analyzer	16m 43s
Android / Android	6m 25s
Make / Make (Nintendo Switch)	3m 24s
CMake / CMake (Linux SDL2)	1m 51s
Make / Make (PS Vita)	10m 16s
CMake / CMake (macOS SDL2)	1m 54s
CMake / CMake (Windows SDL2)	6m 50s
CMake / CMake (macOS SDL2 App Bundle)	3m 14s
Make / Make (Linux x86-64 SDL2 Release)	2m 47s
Make / Make (Linux x86-64 SDL2 Debug)	3m 0s
Make / Make (Linux ARM64 SDL2 Release)	4m 6s
Make / Make (Linux ARM64 SDL2 Debug)	4m 35s
Make / Make (macOS SDL2)	7m 58s
Make / Make (macOS SDL2 App Bundle)	4m 36s
	1h 40m 55s

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