Add postgres code

- Set is currently working
- Other methods to test

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

heromodels/Cargo.toml

@@ -15,11 +15,20 @@ tst = { path = "../tst" }
 heromodels-derive = { path = "../heromodels-derive" }
 heromodels_core = { path = "../heromodels_core" }
 rhailib_derive = { package = "derive", path = "../../rhailib/src/derive" }
-rhai = { version = "1.21.0", features = ["std", "sync", "decimal", "internals"] } # Added "decimal" feature, sync for Arc<Mutex<>>
+rhai = { version = "1.21.0", features = [
+  "std",
+  "sync",
+  "decimal",
+  "internals",
+] } # Added "decimal" feature, sync for Arc<Mutex<>>
 rhai_client_macros = { path = "../rhai_client_macros" }
 strum = "0.26"
 strum_macros = "0.26"
 uuid = { version = "1.17.0", features = ["v4"] }
+postgres = { version = "0.19.10", features = ["with-serde_json-1"] }
+jsonb = "0.5.2"
+r2d2 = "0.8.10"
+r2d2_postgres = "0.18.2"
 
 [features]
 default = []
@@ -46,4 +55,4 @@ path = "examples/flow_example.rs"
 [[example]]
 name = "biz_rhai"
 path = "examples/biz_rhai/example.rs"
-required-features = ["rhai"]
+required-features = ["rhai"]