Fix offseason years

[Alex-At-Home]

For expediency reasons I started off with my off season content using the year before. This is very confusing and resulted in hacky translations between the URL and UI. I couldn't immediately fix it because the links were in active use. Now that we're in a quiet spell I'll fix (potentially invalidating some old links, oh well)

Things left to do:

• [x] Fix links on team editor page
• [x] Fix team leaderboard page
• [x] Fix/ensure add players
• Not directly related but might as well fix with some manual re-testing inevitable
  • [x] (~might fix adding players with year set to All~ this works fine in "what if" mode, which is the only way it should be used)
  • [x] (~filter out NBA transfers from previous years~ <- this is fine, there is a buglet/unintended feature that if you click show only transfers off, it shows where they transferred anyway, which is kinda cool)
  • [x] (when you add a player with adjustments via player builder, the def is applied in the wrong direction)

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Name	Status	Preview	Updated
cbb-on-off-analyzer	✅ Ready (Inspect)	Visit Preview	Sep 3, 2022 at 8:15PM (UTC)

[Alex-At-Home]

Notes:

• 20/21 is giving different results currently (21/22 and 22/23 seem to be working)