Feat/xwindow show all windows

[haritkapadia]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update
• Other: Replace this with a description of the type of this PR

Description

This PR adds the ability to display all windows in the current workspace using the internal/xwindow module (rather than just the active workspace). It adds the following config options to enable this behaviour:

label: %title%
label-active: %title%
label-foreground: #aaaaaa
label-active-foreground: #ff0000
label-padding: 1
label-active-padding: 1
enable-click = true
enable-scroll = true
reverse-scroll = true

I have some extra commentary so I'm adding it here.

• I could not compile the project after running clangformat on the whole project.
• I believe this code would be better suited for the internal/xworkspaces module since it shares information and configuration. However, I really wanted this feature *now*, so I put it where I thought was easiest to code.
• I added a new function to ewmh_util that sets an active window.

Related Issues & Documents

#448

Documentation (check all applicable)

• This PR requires changes to the Wiki documentation (describe the changes)
  The added config options need to be documented. The are names and behaviours are the same as the internal/xworkspaces module.
• This PR requires changes to the documentation inside the git repo (please add them to the PR).
• Does not require documentation changes