Add missing scopes for `variable.function` and `message.error` (#43)

Modifications

For each color scheme (.tmTheme), I first check if variable.function has already been handled, as described in #43.
If not, I add new scopes variable.function, variable.annotation, and set their color to be the same as support.function.
- Since most of the time, we simply want library functions and normal functions to have the same color.
If the first point is true, I also add new scope punctuation.definition.annotation, and set its color to be the same as keyword.operater or keyword.operater.arithmetic.
For Agila Extended Monokai only, I added scopes for Makefile build outputs, namely entity.name.filename and message.error.

cobalt dracula light monokai neon