dnf5-copr: add page (#23133)

pages/linux/dnf5-copr.md

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+# dnf5 copr
+
+> Manage Copr repositories on Fedora-based systems.
+> More information: <https://dnf5.readthedocs.io/en/latest/dnf5_plugins/copr.8.html>.
+
+- Enable a Copr repository:
+
+`sudo dnf5 copr enable {{owner}}/{{project}}`
+
+- Enable a Copr repository for a specific chroot:
+
+`sudo dnf5 copr enable {{owner}}/{{project}} {{fedora-rawhide-ppc64le}}`
+
+- Enable a Copr repository from a specific hub:
+
+`sudo dnf5 copr enable {{hub}}/{{owner}}/{{project}}`
+
+- Disable a Copr repository:
+
+`sudo dnf5 copr disable {{owner}}/{{project}}`
+
+- Remove a Copr repository:
+
+`sudo dnf5 copr remove {{owner}}/{{project}}`
+
+- List Copr repositories:
+
+`dnf5 copr list`
+
+- Print debug information about the system:
+
+`dnf5 copr debug`