ppa-purge: add page (#24593)

pages/linux/ppa-purge.md

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+# ppa-purge
+
+> Disable a PPA and revert its packages to the official versions.
+> More information: <https://manned.org/ppa-purge>.
+
+- Disable a PPA and downgrade its packages to the official versions:
+
+`sudo ppa-purge ppa:{{owner}}/{{ppa_name}}`
+
+- Disable a PPA given only its [o]wner (the PPA name defaults to `ppa`):
+
+`sudo ppa-purge -o {{owner}}`
+
+- Disable a PPA given its [o]wner and [p]PA name:
+
+`sudo ppa-purge -o {{owner}} -p {{ppa_name}}`
+
+- Answer [y]es to all package manager prompts:
+
+`sudo ppa-purge -y ppa:{{owner}}/{{ppa_name}}`
+
+- Use a specific [d]istribution instead of the detected one:
+
+`sudo ppa-purge -d {{distribution}} ppa:{{owner}}/{{ppa_name}}`
+
+- Display [h]elp:
+
+`ppa-purge -h`