Adding repositories directly related to SxT (electric-capital#1542)

* Space and time ecosystem review

* sort data

* specific repos built on SxT

* add space and time specific repos

* clean merge

* upcoming changes

* upcoming changes

* format

* right order

data/ecosystems/s/space-and-time.toml

@@ -6,6 +6,24 @@ sub_ecosystems = []
 github_organizations = ["https://github.com/spaceandtimelabs", "https://github.com/SxT-Community"]
 
 # Repositories
+[[repo]]
+url = "https://github.com/HorizenLabs/proof-of-sql-verifier"
+
+[[repo]]
+url = "https://github.com/HorizenLabs/sxt-proof-of-sql"
+
+[[repo]]
+url = "https://github.com/HorizenLabs/zkVerify"
+
+[[repo]]
+url = "https://github.com/instruxi-io/sxt-utils"
+
+[[repo]]
+url = "https://github.com/instruxi-io/SxT-Utils-Hardhat"
+
+[[repo]]
+url = "https://github.com/linera-io/airdrop-demo"
+
 [[repo]]
 url = "https://github.com/spaceandtimelabs/arrow"