repo-add: fix incorrect description, add manual addition and a see also section (#17594)

Author: Managor

pages/linux/repo-add.md

@@ -1,13 +1,18 @@
 # repo-add
 
 > Package database maintenance utility which enables installation of said package via Pacman.
+> See also: `repo-remove`.
 > More information: <https://manned.org/repo-add>.
 
 - Create an empty repository:
 
 `repo-add {{path/to/database.db.tar.gz}}`
 
-- Add all package binaries in the current directory and remove the old database file:
+- Add packages to the repository:
+
+`repo-add {{path/to/database.db.tar.gz}} {{package1.pkg.tar.zst package2.pkg.tar.zst ...}}`
+
+- Add all package binaries in the current directory and remove any outdated package files:
 
 `repo-add {{[-R|--remove]}} {{path/to/database.db.tar.gz}} {{*.pkg.tar.zst}}`
 

pages/linux/repo-remove.md

@@ -1,6 +1,7 @@
 # repo-remove
 
 > Package database maintenance utility which removes packages from a local repository.
+> See also: `repo-add`.
 > More information: <https://manned.org/repo-add>.
 
 - Remove a package from a local repository: