Update "help keys" output to include keycodes for ESC, F1-F12, and numpad keys

[cdwfs]

This is a follow-up to #2245. It updates the list of keys and keycodes output by the help keys console command to include ESC, F1-F12, and the numpad keys. The new output:

>help keys
+------+-----+  +------+--------------+
| CODE | KEY |  | CODE | KEY          |
+------+-----+  +------+--------------+
|    1 | A   |  |   37 | MINUS        |
|    2 | B   |  |   38 | EQUALS       |
|    3 | C   |  |   39 | LEFTBRACKET  |
|    4 | D   |  |   40 | RIGHTBRACKET |
|    5 | E   |  |   41 | BACKSLASH    |
|    6 | F   |  |   42 | SEMICOLON    |
|    7 | G   |  |   43 | APOSTROPHE   |
|    8 | H   |  |   44 | GRAVE        |
|    9 | I   |  |   45 | COMMA        |
|   10 | J   |  |   46 | PERIOD       |
|   11 | K   |  |   47 | SLASH        |
|   12 | L   |  |   48 | SPACE        |
|   13 | M   |  |   49 | TAB          |
|   14 | N   |  |   50 | RETURN       |
|   15 | O   |  |   51 | BACKSPACE    |
|   16 | P   |  |   52 | DELETE       |
|   17 | Q   |  |   53 | INSERT       |
|   18 | R   |  |   54 | PAGEUP       |
|   19 | S   |  |   55 | PAGEDOWN     |
|   20 | T   |  |   56 | HOME         |
|   21 | U   |  |   57 | END          |
|   22 | V   |  |   58 | UP           |
|   23 | W   |  |   59 | DOWN         |
|   24 | X   |  |   60 | LEFT         |
|   25 | Y   |  |   61 | RIGHT        |
|   26 | Z   |  |   62 | CAPSLOCK     |
|   27 | 0   |  |   63 | CTRL         |
|   28 | 1   |  |   64 | SHIFT        |
|   29 | 2   |  |   65 | ALT          |
|   30 | 3   |  |   66 | ESC          |
|   31 | 4   |  |   67 | F1           |
|   32 | 5   |  |   68 | F2           |
|   33 | 6   |  |   69 | F3           |
|   34 | 7   |  |   70 | F4           |
|   35 | 8   |  |   71 | F5           |
|   36 | 9   |  |   72 | F6           |
|      |     |  |   73 | F7           |
|      |     |  |   74 | F8           |
|      |     |  |   75 | F9           |
|      |     |  |   76 | F10          |
|      |     |  |   77 | F11          |
|      |     |  |   78 | F12          |
|      |     |  |   79 | NUM0         |
|      |     |  |   80 | NUM1         |
|      |     |  |   81 | NUM2         |
|      |     |  |   82 | NUM3         |
|      |     |  |   83 | NUM4         |
|      |     |  |   84 | NUM5         |
|      |     |  |   85 | NUM6         |
|      |     |  |   86 | NUM7         |
|      |     |  |   87 | NUM8         |
|      |     |  |   88 | NUM9         |
|      |     |  |   89 | NUMPLUS      |
|      |     |  |   90 | NUMMINUS     |
|      |     |  |   91 | NUMMULTIPLY  |
|      |     |  |   92 | NUMDIVIDE    |
|      |     |  |   93 | NUMENTER     |
|      |     |  |   94 | NUMPERIOD    |
+------+-----+  +------+--------------+

Selfishly, it also adds my name to the contributors list in the README.

[cdwfs]

@nesbox I've also updated the key() wiki entry with the new keycodes. Note that the keycode list on tic80.com/learn should also be updated to match the new output, but that doesn't seem to be part of this repository.

[Skeptim]

Isn't it a problem that Esc, F7-F9 and F11 are already used for switching to menu, screenshots, full screen… ?

[nesbox]

@TimotheeGreg Yes, it's a problem, but anyway, you can handle them

[Skeptim]

Ok, I'll just add a note to the wiki about that.