sng: migrate to brewed X11
sng: migrate to brewed X11

Also added license. Supports #64166.

- [x] `brew install FORMULA` on this list (should be poured from a bottle, not built from source)
- [x] Run `brew linkage FORMULA` and observe which X11 libraries it links against
- [x] Modify the formula to remove `depends_on :x11` and replace it with e.g. `depends_on "libx11"` and any additional X libraries
- [x] Update `/opt/X11` or `MacOS::XQuartz` references to instead point them to the brewed formula paths
- [x] `revision` bump
- [x] `brew install -s FORMULA` and `brew linkage FORMULA` to check that it's now linking against brewed X and not XQuartz

Closes #64646.

Signed-off-by: Jonathan Chang <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@jonathanchang.org>
Signed-off-by: BrewTestBot <8a898ee6867e4f2028e63d2a6319b2224641c06c@users.noreply.github.com>

cblecker/homebrew-core,nandub/homebrew-core,makigumo/homebrew-core,mbcoguno/homebrew-core,mbcoguno/homebrew-core,mfikes/homebrew-core,mfikes/homebrew-core,Linuxbrew/homebrew-core,adam-moss/homebrew-core,mbcoguno/homebrew-core,stgraber/homebrew-core,makigumo/homebrew-core,Moisan/homebrew-core,sjackman/homebrew-core,cblecker/homebrew-core,Moisan/homebrew-core,Homebrew/homebrew-core,sjackman/homebrew-core,JCount/homebrew-core,uyjulian/homebrew-core,Linuxbrew/homebrew-core,chrisfinazzo/homebrew-core,zyedidia/homebrew-core,zyedidia/homebrew-core,lemzwerg/homebrew-core,dsXLII/homebrew-core,filcab/homebrew-core,nbari/homebrew-core,uyjulian/homebrew-core,spaam/homebrew-core,filcab/homebrew-core,JCount/homebrew-core,nandub/homebrew-core,chrisfinazzo/homebrew-core,Homebrew/homebrew-core,lemzwerg/homebrew-core,spaam/homebrew-core,dsXLII/homebrew-core,adam-moss/homebrew-core,stgraber/homebrew-core,nbari/homebrew-core