simple hover for systemverilog variables and parameters

[Yushiao]

Hello

I made a feature that show the line where the variable declare when mouse hover to the variable

like pictures below

If there are any problems, let me know

[mshr-h]

First of all, thank you for sending me your great PR.

I have a few comments below.

1. Variables defined as inout is also port. (https://www.hdlworks.com/hdl_corner/verilog_ref/items/PortDeclaration.htm)
2. There are some integer and real types not only int but also byte, long, etc... (https://www.doulos.com/knowhow/sysverilog/tutorial/datatypes/)

[Yushiao]

Hi,

I update the supported datatypes for byte, long, etc...

But typedef, struct, and enum are not working now

[mshr-h]

Looks good to me! Cheers! 🍻