lexicons,api: add avatar field to profile lexicon

Signed-off-by: Anirudh Oppiliappan <[e-mail]>

api/tangled/actorprofile.go

···
 // RECORDTYPE: ActorProfile
 type ActorProfile struct {
 	LexiconTypeID string `json:"$type,const=sh.tangled.actor.profile" cborgen:"$type,const=sh.tangled.actor.profile"`
+	// avatar: Small image to be displayed next to posts from account. AKA, 'profile picture'
+	Avatar *util.LexBlob `json:"avatar,omitempty" cborgen:"avatar,omitempty"`
 	// bluesky: Include link to this account on Bluesky.
 	Bluesky bool `json:"bluesky" cborgen:"bluesky"`
 	// description: Free-form profile description text.

api/tangled/cbor_gen.go

···
 	}
 
 	cw := cbg.NewCborWriter(w)
-	fieldCount := 8
+	fieldCount := 9
+
+	if t.Avatar == nil {
+		fieldCount--
+	}
 
 	if t.Description == nil {
 		fieldCount--
···
 				return err
 			}
 
+		}
+	}
+
+	// t.Avatar (util.LexBlob) (struct)
+	if t.Avatar != nil {
+
+		if len("avatar") > 1000000 {
+			return xerrors.Errorf("Value in field \"avatar\" was too long")
+		}
+
+		if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("avatar"))); err != nil {
+			return err
+		}
+		if _, err := cw.WriteString(string("avatar")); err != nil {
+			return err
+		}
+
+		if err := t.Avatar.MarshalCBOR(cw); err != nil {
+			return err
 		}
 	}
 
···
 					}
 
 				}
+			}
+			// t.Avatar (util.LexBlob) (struct)
+		case "avatar":
+
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+					t.Avatar = new(util.LexBlob)
+					if err := t.Avatar.UnmarshalCBOR(cr); err != nil {
+						return xerrors.Errorf("unmarshaling t.Avatar pointer: %w", err)
+					}
+				}
+
 			}
 			// t.Bluesky (bool) (bool)
 		case "bluesky":

lexicons/actor/profile.json

···
       "key": "literal:self",
       "record": {
         "type": "object",
-        "required": [
-          "bluesky"
-        ],
+        "required": ["bluesky"],
         "properties": {
+          "avatar": {
+            "type": "blob",
+            "description": "Small image to be displayed next to posts from account. AKA, 'profile picture'",
+            "accept": ["image/png", "image/jpeg"],
+            "maxSize": 1000000
+          },
           "description": {
             "type": "string",
             "description": "Free-form profile description text.",