feat(wm): allow resize-axis for custom primary col

This commit allows the resize-axis cmd on Axis::Horizontal to operate on
the Primary column of a CustomLayout.

Note that this will only operate on a CustomLayout that has met the
window count threshold to enable the tertiary column. If it has not, the
layout will render as DefaultLayout::Columns, which does not support the
resize-axis cmd.

komorebic/src/main.rs

@@ -400,7 +400,7 @@ enum SubCommand {
     #[clap(setting = AppSettings::ArgRequiredElseHelp)]
     #[clap(alias = "resize")]
     ResizeEdge(Resize),
-    /// Resize the focused window along the specified axis
+    /// Resize the focused window or primary column along the specified axis
     #[clap(setting = AppSettings::ArgRequiredElseHelp)]
     ResizeAxis(ResizeAxis),
     /// Unstack the focused window