feat: Support duration parameter for account muting

The `duration` parameter was added in v3.3.0, which takes the number of seconds to mute, instead of muting the account forever.

ref. accounts API methods - Mastodon documentation - https://docs.joinmastodon.org/methods/accounts/#mute

src/mastodon/rest/v1/account-repository.ts

@@ -62,6 +62,8 @@ export interface UpdateCredentialsParams {
 export interface MuteAccountParams {
   /** Mute notifications in addition to statuses? Defaults to true. */
   readonly notifications?: boolean;
+  /** Duration to mute in seconds. Defaults to 0 (indefinite). */
+  readonly duration?: number;
 }
 
 export interface CreateAccountNoteParams {