fix(alot): restore esc = exit in search mode, add / = refineprompt

esc closes the search buffer (exits alot only if it is the last buffer).
/ opens a prompt pre-filled with the current query for regex refinement.

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

alot/config

@@ -7,6 +7,9 @@
         draft_box       = maildir:///home/themiro/Mail/Drafts
 
 [bindings]
+    [[search]]
+        esc = exit
+        / = refineprompt
     [[thread]]
         esc = exit
     [[taglist]]