Add vendor: 21energy

[milansoap]

What's in this PR

Type: New vendor listing

---

About your shop

Shop name	21energy
Website	https://21energy.com
Region	Europe
Where to find you in the community	https://x.com/21energy_com

Note: in your vendor JSON social section, use only x, instagram, youtube, tiktok, nostr.

---

Vendor confirmation

These confirmations are reviewed manually by maintainers and the community.

I sell genuine Bitaxe hardware	Yes
My shop is live and active	Yes
I am reachable in the community	Yes
I use the correct name Bitaxe on my Bitaxe product pages	Yes
My Bitaxe product pages use real product photos	Yes
My Bitaxe product pages link to https://bitaxe.org	Yes
I do not sell Bitaxe-derived products in ways that violate Bitaxe open-source license terms	Yes
I am not aware of open fraud or counterfeit reports about my shop	Yes
I understand listings can be removed if confirmed issues arise	Yes

---

Anything else the community should know?

Vendor confirmation was already stated in the original PR text. This update only aligns the body to the current PR metadata validator.

[WantClue]

ACK

[DerekLoadout]

Thanks @milansoap — vendor JSON and logo pass schema/slug/size checks on my side.

I aligned the PR body to the current metadata form so CI can pass. No content or vendor-quality review changes were made.

Leaving final qualitative/manual review to @skot.