[website] redisign the "play" section

[atesin]

hi.. i already made a suggestion here = #2388 , but i was thinking a little better and conclude the play section is very basic, constrained, and should suffer many changes to be more useful/easy ... maybe not so hard to implement, like

• make the carts organized with attached labels instead fixed categories/directories
  • i took this idea from what i read from gmail in its early days of developing, developers were more fans of labels than folders because a message can have many labels attached, and are more easy/flexible to filter
• INCLUDE A LABEL JUST FOR LIBRARIES
  • i mean a "libs" label separate than "tech", currently there the "tech" category that fits more or less but not perfect,... i think tech are to test snippets and algorithms, while libs are ready-to-use functions/classes for include in your programs (see #2414 also, these suggestions together could mean a powerful way to boost tic80 developing and growing)
• get filters together with sortings
  • if website uses sql, filters and sortings looks just easy with SELECT, WHERE and ORDER BY, like SELECT <cols> FROM carts WHERE label=xxx AND <more conditions> ORDER BY name, downloads, rating, date, etc
• add alphabetic sortimg, and filter by author (and others)
  • currently the website lacks these functions, (maybe a devs page with similar filters/sorts would be nice also)
• ability for system to suggest existing labels and for users to create new labes, when posting/editing carts (like GAME GENRE, etc.)
• some others i forgot for now, post yours below

for example, to get inspiration, see how some blogs work with labels, and how games are presented in itch.io website :)