docs: reorganize main toc

Signed-off-by: Arthur Zamarin <arthurzam@gentoo.org>

Author: arthurzam

doc/index.rst

@@ -8,6 +8,13 @@ Contents:
     :maxdepth: 4
 
     man/pkgdev
+    man/pkgdev/commit
+    man/pkgdev/manifest
+    man/pkgdev/mask
+    man/pkgdev/push
+    man/pkgdev/showkw
+    man/pkgdev/tatt
+    man/config
 
 Indices and tables
 ==================