transmission-edit: add page (#8458)

* transmission-edit: add page

* Rewrite example description

pages/common/transmission-edit.md

@@ -0,0 +1,13 @@
+# transmission-edit
+
+> Modify announce URLs from torrent files.
+> See also: `transmission`.
+> More information: <https://manned.org/transmission-edit>.
+
+- Add or remove a URL from a torrent's announce list:
+
+`transmission-edit --{{add|delete}} {{http://example.com}} {{path/to/file.torrent}}`
+
+- Update a tracker's passcode in a torrent file:
+
+`transmission-edit --replace {{old-passcode}} {{new-passcode}} {{path/to/file.torrent}}`