[doc] update ROADMAP.rst and documentation

Change-Id: Ic94013d7a403aa1651567527a4d194b7650f17f1

ROADMAP.rst

@@ -1,6 +1,7 @@
 Current Release Changes
 =======================
 
+* Add :meth:`title()<pywikibot.MediaInfo.title>` method to :class:`pywikibot.MediaInfo` (:phab:`T366424`)
 * Add tags to the wikibase functions (:phab:`T372513`)
 * :func:`diff.get_close_matches_ratio()` function was added
 * Initialize super classes of :exc:`EditReplacementError` (:phab:`T212740`)

pywikibot/page/_wikibase.py

@@ -510,22 +510,27 @@ def get(self, force: bool = False) -> dict:
         # reloading files without MediaInfo will fail.
         return super().get()
 
-    def getID(self, numeric: bool = False):
-        """
-        Get the entity identifier.
+    def getID(self, numeric: bool = False) -> str | int:
+        """Get the entity identifier.
+
+        .. seealso:: :meth:`title`
 
         :param numeric: Strip the first letter and return an int
-        :raise NoWikibaseEntityError: if this entity is associated with
-                                      a non-existing file
+        :raises NoWikibaseEntityError: if this entity is associated with
+            a non-existing file
         """
         self._assert_has_id()
         return super().getID(numeric=numeric)
 
-    def title(self):
-        """
-        Return ID as title of the MediaInfo.
+    def title(self) -> str:
+        """Return ID as title of the MediaInfo.
+
+        .. versionadded:: 9.4
+        .. seealso:: :meth:`getID`
 
-        :return: str: the entity identifier
+        :raises NoWikibaseEntityError: if this entity is associated with
+            a non-existing file
+        :return: the entity identifier
         """
         return self.getID()