Add a Gear column showing profession tool and accessory slots

[bifferz]

I've been thinking it'd be nice to see profession gear at a glance across my many alts in the table, so I put together a Gear column that shows the tool and accessory slots for each profession row.

Each slot renders as an icon with a quality color border and a rank star overlay in the top-left corner. Hovering shows the item tooltip. Unscanned characters show dimmed empty slots so you can tell the difference between "no gear" and "not checked yet."

A few things I worked through along the way:

• Gear is filtered to only show on the expansion row it actually belongs to — so War Within enchanting gear won't bleed onto a Midnight Enchanting row
• The profession to slot group mapping uses the equipped tool's item subtype rather than index order, which turned out to be unreliable
• Items not yet in the client cache get a pending state and rescan automatically when the data loads

I also bumped TABLE_ROW_HEIGHT from 24 to 30 — the icons needed a bit more breathing room and it felt like an improvement overall, but happy to revert that if you'd prefer to keep the denser layout.

Here's a quick preview after my changes

I also just saw on dev that you've got sorting working in a different way. I implemented a "gear score" and sorting here, but that can be scrapped for your implementation obviously. Also, sorry for the messy commit history we can squash those down.

Open to any feedback you might have!