(chore) deprecate C-like

[joshgoebel]

Deprecates c-like grammar (though still allows it's use) and copies
the contents fully into c and cpp grammars which will now diverge
as time goes on.

c still has auto-detect disabled at this point as it's just a clone
of cpp, but when someone is ready to simplify the c grammar tests
may be added and auto-detect may be turned back on.

Checklist

• Added markup tests, or they don't apply here because...
• Updated the changelog at CHANGES.md
• Added myself to AUTHORS.txt, under Contributors

[joshgoebel]

This diff is huge but essentially it's just a few trivial things:

• copy c-like into c.js (tweaking name and aliases)
• copy c-like into cpp.js (tweaking name and aliases)
• c.js has autoDetect: false still (see comment in PR main text)
• c-like now depends on cpp (build time)
• c-like attempt to see if c and cpp are loaded yet and if not will claim all C and C++ aliases for itself (to support users using it directly even though they should not be)
• update c-like comments to explain the current situation

[joshgoebel]

This work is to force the grammars to begin to diverge even if no one wants to put in the FULL time yet to make them perfect. c-like paved the way for this to happen (in v10) but did not actually encourage this to happen as patches just kept changing c-like.