refactor: deprecate parent and channelKey in compose action (#476)

* refactor: deprecate `parent` in `ComposerActionMessage`

* chore: changesets

* nit: horsefacts review

.changeset/tiny-walls-collect.md

@@ -0,0 +1,34 @@
+---
+"frog": minor
+---
+
+**Breaking Change**: `parent` and `channelKey` are deprecated in `ComposerActionMessage`
+
+```diff
+import { postComposerActionMessage } from 'frog/next'
+
+postComposerActionMessage({
+  type: "createCast",
+  data: {
+    cast: {
+      embeds: [/*...*/];
+      text: 'Hi';
+-     parent: '0x...'
+-     channelKey: '...'
+    };
+  };
+})
+```
+
+```diff
+import { postComposerCreateCastActionMessage } from 'frog/next'
+
+postComposerCreateCastActionMessage({
+  embeds: [/*...*/];
+  text: 'Hi';
+- parent: '0x...'
+- channelKey: '...'
+})
+```
+
+[See More](https://warpcast.com/horsefacts.eth/0x98185a2f).

src/next/postComposerActionMessage.ts

@@ -2,9 +2,7 @@ export type ComposerActionMessage = {
   type: 'createCast'
   data: {
     cast: {
-      channelKey?: string | undefined
       embeds: string[]
-      parent?: string | undefined
       text: string
     }
   }