pactree: add page (#7326)

pages/linux/pactree.md

@@ -0,0 +1,24 @@
+# pactree
+
+> Package dependency tree viewer for pacman.
+> More information: <https://man.archlinux.org/man/pactree.8>.
+
+- Print the dependency tree of a specific package:
+
+`pactree {{package}}`
+
+- Print what packages depend on a specific package:
+
+`pactree --reverse {{package}}`
+
+- Dump dependencies one per line, skipping duplicates:
+
+`pactree --unique {{package}}`
+
+- Include optional dependencies of a specific package and colorize the output:
+
+`pactree --optional --color {{package}}`
+
+- Display help:
+
+`pactree`