[Reserved for Alianin] Create links to dawnglare boards with ^board

[RheingoldRiver]

• ^board GGGGGG GGGGGG GGGGGG GGGGGG GGGGGG should link you to https://pad.dawnglare.com/?patt=GGGGGGGGGGGGGGGGGGGGGGGGGGGGGG&showfill=1
  • Fill direction is RIGHT then DOWN
  • Validate that there are either 20 (5x4) or 30 (6x5) or 42 (7x6) letters specified
  • If it's 5x4 or 7x6 then add the appropriate board size to the URL (&height=6&width=7 or &height=4&width=5)
  • Remove all spaces
  • Also include the param &showfill=1 at the end of the url
• ^board -1 LLLLL DDDDD LLLLL DDDDD LLLLL DDDDD should link you to https://pad.dawnglare.com/?patt=LDLDLDLDLDLDLDLDLDLDLDLDLDLDLD&showfill=1 - the -1 at the start causes it to first invert the pattern and then fill it
  • The spaces are irrelevant to the inversion, it's just the -1 causing this
  • I think you should do this with matrices but I'm not sure?
  • Fill direction is DOWN then RIGHT
  • Same thing about board sizes

Allowed letters: RGBLDHXJMPZ, if any other letter is included, use send_cancellation_message (this comes from the library tsutils which is on PyPI) to inform that the user has used an invalid color

This should go in the padinfo cog in padinfo.py!

[Alianin]

Do we need to account for people potentially entering O for bomb instead of X?

[RheingoldRiver]

That would be a cool feature to support, but in the future it's possible O means something different and then we'd be breaking compatibility with our correction so I think it's better to not.

Also, since I made this ticket, Z is now also a possible orb type (it's an empty square with no orb) (we feature requested this to the dawnglare dev so we can implement #1768)