more swagger docs + other changes (#125)

* more swagger docs + other changes

* go fmt

internal/api/model/emoji.go

@@ -42,6 +42,7 @@ type Emoji struct {
 }
 
 // EmojiCreateRequest represents a request to create a custom emoji made through the admin API.
+//
 // swagger:model emojiCreateRequest
 type EmojiCreateRequest struct {
 	// Desired shortcode for the emoji, without surrounding colons. This must be unique for the domain.