LibWeb: Iterate over text chunks using a grapheme-aware segmenter #3791

Job	Run time
Lagom (Linux, ubuntu-22.04, FUZZ, Clang, false) / CI	6m 41s
Lagom (Linux, ubuntu-22.04, NO_FUZZ, Clang, true) / CI	15m 0s
Lagom (Linux, ubuntu-22.04, NO_FUZZ, GNU, false) / CI	23m 6s
Lagom (macOS, macos-14, NO_FUZZ, Clang, false) / CI	19m 32s
	1h 4m 19s

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