Improving auto-completion by using the "include" subtype

[jdose100]

I recently started working with this lsp and came across the fact that it does not fully support the include directive. That is, when you include another file, auto-completion does not offer new characters defined in another file. I would like to see this feature here, as it is very convenient.

[WillLillis]

This should be doable, but will have to be implemented on an assembler-by-assembler basis. Can I ask which one you're using?

I'll make a pass on implementing this after our new testing framework (see #228) is in place, as we currently have no means to test with multiple files.

[jdose100]

Hello, I'm currently using GNU assembler. But I also expect fasm support

[WillLillis]

Hello, I'm currently using GNU assembler. But I also expect fasm support

I'll make sure to cover FASM too once it's added (#218).