plenv: add page (#7118)

pages/common/plenv.md

@@ -0,0 +1,32 @@
+# plenv
+
+> Switch between multiple versions of Perl.
+> More information: <https://github.com/tokuhirom/plenv>.
+
+- Show the currently selected Perl version and how it was selected:
+
+`plenv version`
+
+- List all available installed Perl versions:
+
+`plenv versions`
+
+- Set the global Perl version (used unless a local or shell version takes priority):
+
+`plenv global {{version}}`
+
+- Set the local application-specific Perl version (used in the current directory and all directories below it):
+
+`plenv local {{version}}`
+
+- Set the shell-specific Perl version (used for the current session only):
+
+`plenv shell {{version}}`
+
+- Display help:
+
+`plenv`
+
+- Display help for a command:
+
+`plenv help {{command}}`