Turn on naming conventions checker

[lmwnshn]

Right now, we're not enforcing terrier-style naming checks on the codebase. We didn't switch this check on early enough, and we don't want to make students go back and fix up their old code only for style. So we'll wait until the semester is over before we enable this check.

Just uncomment these lines.

[skyzh]

Already resolved.

/Users/skyzh/Work/bustub/src/binder/parser.cpp:43:6: error: invalid case style for function 'test_func' [readability-identifier-naming,-warnings-as-errors]
void test_func() {}
     ^~~~~~~~~
     TestFunc
The files that failed were:
['/Users/skyzh/Work/bustub/src/binder/parser.cpp']
Note that a failing .h file will fail all the .cpp files that include it.