feat(wiki): rename pages with --title alone, page lists on the client

wiki edit P --title New failed with "supply --body": renaming now keeps
the page's content, and edit needs one of --title, --body, --body-file
or --editor. wiki list --limit 1 returned every page because Gitea
replaces a limit of 1 with its default; the page list is now read whole
and paged on the client, so --limit and --page hold and the context line
counts the pages.

wiki create takes the title as an argument and, without --body, asks for
the content in the editor or an inline multi-line field. wiki view shows
the author, last update and revision count above the rendered page, and
--web opens it. wiki list and revisions show headed columns, page names
complete with Tab, and every change reports a ✓ line.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/app_test.go

@@ -494,12 +494,6 @@ const (
 	time delete
 	time list
 	time reset
-	wiki create
-	wiki delete
-	wiki edit
-	wiki list
-	wiki revisions
-	wiki view
 `
 	longsToWrite = `
 	issue
@@ -512,6 +506,5 @@ const (
 	pr attachment
 	pr comment
 	time
-	wiki
 `
 )