feat: If need approval to join the group in groupMetadata (#533)

* If need approval to join the group

* If need approval to join the group

* Update groups.ts

* Update groups.ts

* fix lint

* Update groups.ts

* Update groups.ts

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Co-authored-by: Bob <115008575+FortisEtMagnus@users.noreply.github.com>
Co-authored-by: Bob <115008575+bobpetrov@users.noreply.github.com>

src/Types/GroupMetadata.ts

@@ -22,6 +22,8 @@ export interface GroupMetadata {
     announce?: boolean
     /** is set when the group also allows members to add participants */
     memberAddMode?: boolean
+    /** Request approval to join the group */
+    joinApprovalMode?: boolean
     /** is this a community */
     isCommunity?: boolean
     /** is this the announce of a community */