streamline syntax definition

[guillermooo]

Currently, the syntax def tries too hard to capture function defs. This leads to a complicated syntax def. The goal of this approach was to enable symbol navigation using ST's own mechanism for it. However, it doesn't work great and the analysis server should offer better results in the future.

Therefore, the syntax def could be simplified and improved for the general cases, while offloading more complex tasks to the analysis server.

[guillermooo]

Old syntax will be superseded by new .sublime-syntax.