switch to fuzzel launcher and fix swaylock color

Replace wmenu with fuzzel configured in the sway color palette.
Fix swaylock background from tokyo night #1a1b26 to #0a0a0a.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config/fuzzel/fuzzel.ini

@@ -0,0 +1,17 @@
+[main]
+terminal=foot
+width=30
+lines=10
+anchor=center
+
+[colors]
+background=0a0a0aff
+text=f3eeeaff
+match=cd0a00ff
+selection=cd0a00ff
+selection-text=f3eeeaff
+border=cd0a00ff
+
+[border]
+width=2
+radius=4