pydoc: add page (#10575)

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/pydoc.md

@@ -0,0 +1,16 @@
+# pydoc
+
+> Display offline Python documentation.
+> More information: <https://docs.python.org/3/library/pydoc.html>.
+
+- Print documentation on a subject (Python keyword, topic, function, module, package, etc.):
+
+`pydoc {{subject}}`
+
+- Start an HTTP server on an arbitrary unused port and open a [b]rowser to see the documentation:
+
+`pydoc -b`
+
+- Display help:
+
+`pydoc`