Add vendor for support and skill gems in hideout

Honestly, respeccing in poe 2 is pain in the ass. The way it is made is obnoxious and silly.

Despite clearing t15 maps, you have no vendor to buy from skill gems and uncut support gems.

Unlike in poe 1 where you could buy most of what you need from vendor directly.

Not only have I ran out of gold, and had to waste 20 mins selling junk from stash tabs into tiny inventory and then to a vendor to make respec, because the game does not have respec orbs like in poe1, which made respec convenient easy and essentially free.

But buying skill gems and uncut gems from random people on trade makes the situation 100x worse.

Finding gems is not an issue. We don't need a vendor that sells gems for gold. What we need is a vendor that lets us downgrade gems. Eg. buy a lvl 17 gem at the cost of a lvl 18 gem, all the way down to lvl 1.