vim mode: support `gf` command

[hferreiro]

Check for existing issues

• [X] Completed

Describe the feature

The "goto file" command in vim allows to navigate to the file whose name is under or after the cursor.

This command is very handy to navigate to header files in C/C++.

If applicable, add mockups / screenshots to help present your vision of the feature

No response

[dgrr]

This is already present?

[mirageN1349]

It's very difficult without this function

[vmchale]

<C-w><C-f> will open the file in a new buffer (in Zed, I suppose a new tab) as well.