greed: add page (#23010)

Co-authored-by: Florian B. <gn0mish@protonmail.com>
Co-authored-by: Adriano Inghingolo <68734231+SpikeTheDragon40k@users.noreply.github.com>
Co-authored-by: Meinard Francisco <44516102+znarfm@users.noreply.github.com>

pages/common/greed.md

@@ -0,0 +1,29 @@
+# greed
+
+> Simple puzzle game.
+> Clear as much of the board as you can.
+> More information: <https://manned.org/greed>.
+
+- Start the game:
+
+`greed`
+
+- Open help:
+
+`<?>`
+
+- Toggle move [p]reviews:
+
+`<p>`
+
+- Quit:
+
+`<q><y>`
+
+- Print [s]cores:
+
+`greed -s`
+
+- Play with a custom board size and seed:
+
+`greed -w {{width}} -h {{height}} -r {{seed}}`