pop: add page (#10581)

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/pop.md

@@ -0,0 +1,16 @@
+# pop
+
+> Send emails from your terminal.
+> More information: <https://github.com/charmbracelet/pop>.
+
+- Launch the Text-based User Interface:
+
+`pop`
+
+- Send an email using the content of a Markdown file as body:
+
+`pop < {{path/to/message.md}} --from {{me@example.com}} --to {{you@example.com}} --subject "{{On the Subject of Ducks...}}" --attach {{path/to/attachment}}`
+
+- Display help and exit:
+
+`pop --help`