chore(tmux): switch to gum based sesh filter

config/tmux/sesh-gum.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+# Get session list and pipe it to gum for selection
+SESH_LIST=$(
+  sesh list -i \
+    | gum filter \
+      --limit 1 \
+      --no-sort \
+      --fuzzy \
+      --placeholder 'Pick a sesh' \
+      --height 50 \
+      --prompt='⚡'
+)
+
+# If a session was selected, connect to it
+if [ "$SESH_LIST" != "" ]; then
+  sesh connect "$SESH_LIST"
+fi