Force custom colour of green for `browser-sync` output

New PHPCS rule to ignore empty IF statements
Removal of two unnecessary rules - comment validation and checking the
alignment of statements
New PHPCS rule to prevent superfluous whitespace
Restructure of custom PHPCS files
Custom ControlSignatureSniff code added to check when 0 spaces and 1
space are/is needed before/after IFs, ELSEIFs, ELSEs, etc.
Error suppression enabled on index `scope_closer`