core: protocol/commands to change member role (#1159)

* core: protocol/commands to change member role

* change member roles

* add test

* correction

Co-authored-by: JRoberts <8711996+jr-simplex@users.noreply.github.com>

* add member profile to group member role events

* resend invitation when invited member role changes

* test role change with invitation, fix

* add delays to tests

* add test delay

Co-authored-by: JRoberts <8711996+jr-simplex@users.noreply.github.com>

docs/protocol/simplex-chat.schema.json

@@ -129,6 +129,9 @@
         "directConnReq": {"ref": "connReqUri"}
       }
     },
+    "groupMemberRole": {
+      "enum": ["author", "member", "admin", "owner"]
+    },
     "callInvitation": {
       "properties": {
         "callType": {"ref": "callType"}
@@ -374,6 +377,17 @@
         }
       }
     },
+    "x.grp.mem.role": {
+      "properties": {
+        "msgId": {"ref": "base64url"},
+        "params": {
+          "properties": {
+            "memberId": {"ref": "base64url"},
+            "role": {"ref": "groupMemberRole"}
+          }
+        }
+      }
+    },
     "x.grp.mem.del": {
       "properties": {
         "msgId": {"ref": "base64url"},