Added tracking Gym Leaders beaten

[KamekoSkye]

Changes

• Added the Gym Leaders as trackable items
• Added the Gym Leader items as automatically being marked when the item is collected
• Added a function to logic.lua to track if any Gym leader has been beaten

As a result:

• Fixed a small issue with offline tracking (and maybe autotracking) if Rt 3 access is set to "beat any gym" or "beat brock"

[KamekoSkye]

I added full pngs of the gym leaders without realising you had the closeups. If you want me to use those images then I can change it if needed.

[coveleski]

Currently this doesn't seem to work? You mentioned you updated logic.lua but it's not in the changes.

Possibly a better approach anyway would be to just give each gym gym_beaten as a secondary itemcode, since that's what we're already checking for and it's probably faster than doing lookups on each different gym leaders itemcode.

[coveleski]

Thanks for the PR though, I'd been meaning to fix this but got real busy! (And tbh not too many people seem to use offline tracking so it was kinda low on the list.)

[KamekoSkye]

Sorry for not adding logic.lua, your suggestion is honestly a better solution and one I didn't think of until after PRing

I've made the changes, it should be ready to merge.
On my end it says I haven't made the required changes, but I have updated items.json, itemgrid.json, and locations.json

As for manual tracking, while I personally use autotracking as much as I can, adding the leaders would have fixed the issue and therefore also fixes things for the random manual tracking person.

[coveleski]

Made a couple modifications to hide the hosted items (they'll clear automatically since poptracker defaults to clear_as_group: true.

Functionality looks good!