build

sub: add closest subtitle option using Levenshtein distance #14849

Job	Run time
win32 (aarch64-pc-windows-msvc, arm64, windows-11-arm)	20m 7s
linux-fuzz	2m 20s
mingw (i686, wine32)	9m 52s
mingw (x86_64, wine64)	10m 20s
macos (macos-15, arm)	4m 41s
macos (macos-14, arm, Xcode_15.2)	3m 53s
macos (macos-13, intel, Xcode_14.1, 2e821e2d8ae38540311cd6ec60f6e1b23d61d167)	6m 11s
linux (clang, clang++, lld, -Db_lto=true -Db_lto_mode=thin)	3m 30s
linux (gcc, g++, -Db_ndebug=true)	2m 34s
macos (macos-15, test, -target arm64-apple-macosx10.15, 10.15)	4m 39s
win32 (x86_64-pc-windows-msvc, x64, windows-latest)	16m 46s
linux-ffmpeg-6-1	1m 1s
openbsd	8m 42s
freebsd	3m 42s
msys2 (mingw64, windows-latest)	5m 47s
msys2 (clang64, windows-latest)	6m 6s
msys2 (ucrt64, windows-latest)	5m 57s
msys2 (clangarm64, windows-11-arm)	5m 43s
	2h 1m 51s

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