Move alerts to their own page, add direct message alerts

src/app/components/AlertDelete.svelte

@@ -1,8 +1,7 @@
 <script lang="ts">
   import Confirm from "@lib/components/Confirm.svelte"
   import type {Alert} from "@app/core/state"
-  import {NOTIFIER_RELAY, NOTIFIER_PUBKEY} from "@app/core/state"
-  import {publishDelete} from "@app/core/commands"
+  import {deleteAlert} from "@app/core/commands"
   import {pushToast} from "@app/util/toast"
 
   type Props = {
@@ -12,10 +11,7 @@
   const {alert}: Props = $props()
 
   const confirm = () => {
-    const relays = [NOTIFIER_RELAY]
-    const tags = [["p", NOTIFIER_PUBKEY]]
-
-    publishDelete({event: alert.event, relays, tags, protect: false})
+    deleteAlert(alert)
     pushToast({message: "Your alert has been deleted!"})
     history.back()
   }