MM-52857 - Add call-join-request to calls widget (#2751)

* add call-join-request to calls widget

* targetID -> callID

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

src/types/calls.ts

@@ -34,4 +34,8 @@ export type CallsLinkClickMessage = {
     link: string | URL;
 }
 
+export type CallsJoinRequestMessage = {
+    callID: string;
+}
+
 export type CallsEventHandler = ((viewName: string, msg: any) => void) | ((viewName: string, opts: Electron.SourcesOptions) => Promise<void>);