fix(config): gracefully handled deprecated asc opt

This commit ensures that if an applications.yaml revision is passed
which includes the now-deprecated border_overflow option, komorebi will
gracefully handle it instead of crashing on an unknown enum variant
error.

komorebi-core/src/config_generation.rs

@@ -18,6 +18,7 @@ pub enum ApplicationOptions {
     Layered,
     TrayAndMultiWindow,
     Force,
+    BorderOverflow,
 }
 
 impl ApplicationOptions {
@@ -36,6 +37,9 @@ impl ApplicationOptions {
             ApplicationOptions::Force => {
                 format!("komorebic.exe manage-rule {kind} \"{id}\"")
             }
+            ApplicationOptions::BorderOverflow => {
+                unreachable!("deprecated");
+            }
         }
     }