Open the agent in a normal tiled window (#6769)

The floating rule pinned every agent terminal to 1200x800, which
overflows small and scaled displays: window rules see logical pixels, so
a 2560x1440 monitor at scale 1.6 is only 1600x900 and the window covered
89% of its height. Tiling drops the fixed size along with the rule, and
the shared app-id still earns the terminal tag from terminals.lua.

default/hypr/apps/agent.lua

@@ -1,3 +0,0 @@
--- omarchy-agent gives every agent terminal the same app-id, so this
--- floats the keybinding, the menu, and a crash diagnosis alike.
-o.window("org\\.omarchy\\.agent", { float = true, center = true, size = { 1200, 800 } })