feat: psp22 trait contract example with drink tests

pop-api/examples/fungibles/Cargo.toml

@@ -5,8 +5,27 @@ name = "fungibles"
 version = "0.1.0"
 
 [dependencies]
-ink = { version = "5.0.0", default-features = false }
-pop-api = { path = "../../../pop-api", default-features = false, features = [ "fungibles" ] }
+ink = { version = "=5.0.0", default-features = false, features = [ "ink-debug" ] }
+pop-api = { path = "../../../pop-api", default-features = false, features = [
+	"fungibles",
+] }
+scale = { package = "parity-scale-codec", version = "3", default-features = false, features = [
+	"derive",
+] }
+scale-info = { version = "2.6", default-features = false, features = [
+	"derive",
+], optional = true }
+
+[dev-dependencies]
+env_logger = { version = "0.11.3" }
+serde_json = "1.0.114"
+
+# Local
+drink = { path = "../../../../pop-drink/drink" }
+pop-sandbox = { path = "../../../pop-sandbox", default-features = false }
+
+# Substrate
+frame-support = { version = "36.0.0", default-features = false }
 
 [lib]
 path = "lib.rs"
@@ -18,4 +37,7 @@ ink-as-dependency = [  ]
 std = [
 	"ink/std",
 	"pop-api/std",
+	"pop-sandbox/std",
+	"scale-info/std",
+	"scale/std",
 ]