Penrose tiling support

[blotwell]

This adds basic support for Penrose rhombus tilings. You can change the default 5-fold symmetry to higher-order equivalent (e.g. 7-fold).

Like with the other tilings already marked as "alpha", some of the detailed support for specific puzzle types is lacking at the moment. But at least connectivity of cells/edges/vertices works. Cursor key navigation in number mode is also supported.

[ABcDexter]

Nice :)

[swaroopg92]

@blotwell Thanks for the PR. I started reviewing this. One thing i noticed, In Sudoku mode, clicking or moving cells it is selecting behind the scenes but the selection not showing up visually. I will look into it eventually but thought to mention it here, in case you already know the reason/fix it.

[blotwell]

Thanks @swaroopg92. I looked into this (it's also broken in two of the other grid types, that's partly why I didn't feel guilty enough to fix it before :)) and the reason is that grid types are enumerated in draw_selection() with the default action being effectively to draw nothing. The basic fix would be this:

diff --git a/docs/js/class_p.js b/docs/js/class_p.js
index b49d2a1..f511c9c 100644
--- a/docs/js/class_p.js
+++ b/docs/js/class_p.js
@@ -12112,7 +12112,7 @@ class Puzzle {
                 } else if (this.gridtype === "iso") {
                     factor = 0;
                     offset = 0;
-                } else if (this.gridtype === "tetrakis_square" || this.gridtype === "cairo_pentagonal") {
+                } else if (this.gridtype === "tetrakis_square" || this.gridtype === "cairo_pentagonal" || this.gridtype === "rhombitrihexagonal" || this.gridtype === "deltoidal_trihexagonal" || this.gridtype === "penrose_P3") {
                     factor = 0;
                     offset = 0;
                 } else {
@@ -12631,4 +12631,4 @@ class Puzzle {
         return !this.version_gt(major, minor, revision);
     }