ptghci: add page (#20851)

Co-authored-by: Emmanuel Ferdman <emmanuelferdman@gmail.com>

pages/common/ptghci.md

@@ -0,0 +1,33 @@
+# ptghci
+
+> Interactive Haskell REPL with syntax highlighting, multiline editing, and real-time type display.
+> See also: `ghci`.
+> More information: <https://github.com/litxio/ptghci>.
+
+- Start an interactive session:
+
+`ptghci`
+
+- Start an interactive session and load a Haskell file:
+
+`ptghci {{path/to/file.hs}}`
+
+- [Interactive] List past commands from the current session:
+
+`%past`
+
+- [Interactive] List past commands including previous sessions:
+
+`%past -n {{number}}`
+
+- [Interactive] Re-run specific commands from history:
+
+`%rerun {{3,4-5,p8}}`
+
+- [Interactive] Search Hoogle for an identifier:
+
+`%hoogle {{identifier}}`
+
+- [Interactive] Change the syntax highlighting style:
+
+`%style {{style_name}}`