Allow renaming of teams' name & tag

[iwa]

fixes #12548

i tried to tackle this one with basic features:

• allow renaming of both name & tag, with their own fields
• add a name_changed_at timestamp field in team's model
• adjustable cooldown (currently set to 7 days) to avoid rename spam
  • prevent renaming during cooldown
  • shows the remaining time before next rename
• add a input-text--disabled css class

Before renaming	After renaming

[iwa]

one thing i'm not sure about is style, when on cooldown i've added a disabled attribute on both inputs, but idk if there's a specific style convention you use to visually determine a field as disabled?

[iwa]

i've added a --disabled subclass to input-text, taking inspiration on what's been done in other parts of the project

haven't bound to [disabled] cause i don't want to cause side effects anywhere else

(updated pr's desc to show the new result)

[peppy]

If we're even considering this, the cooldown should be more like 1 year. Or maybe a store purchase.

[iwa]

if so then either cooldown or store purchase should also apply to creating a team to make it fair, right? but this doesn't really seem like a good idea considering teams are only a social feature
also team name doesn't feel as important as a username so i'm not sure ppl would be willing to pay exclusively for it

i guess 2 possible options could be:

• make a long cooldown as you suggested, applying both for creating & renaming
• lock managing a team (create & update) as a supporter perk, and keep a low or even no cooldown