ico: add page (#10872)

* ico: add page

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/linux/ico.md

@@ -0,0 +1,20 @@
+# ico
+
+> Displays an animation of a polyhedron.
+> More information: <https://manned.org/ico.1>.
+
+- Display the wireframe of an icosahedron that changes its position every 0.1 seconds:
+
+`ico -sleep {{0.1}}`
+
+- Display a solid icosahedron with red faces on a blue background:
+
+`ico -faces -noedges -colors {{red}} -bg {{blue}}`
+
+- Display the wireframe of a cube with size 100x100 that moves by +1+2 per frame:
+
+`ico -obj {{cube}} -size {{100x100}} -delta {{+1+2}}`
+
+- Display the inverted wireframe of an icosahedron with line width 10 using 5 threads:
+
+`ico -i -lw {{10}} -threads {{5}}`