Add PowerTrade fuel assets (#4347)

* add powertrade fuel

* update powertrade fuel logo

* update powertrade fuel logo

blockchains/ethereum/assets/0xC57d533c50bC22247d49a368880fb49a1caA39F7/info.json

@@ -0,0 +1,9 @@
+{
+    "name": "PowerTrade Fuel",
+    "website": "https://power.trade/",
+    "source_code": "https://github.com/Power-Trade/fuel-dao/",
+    "white_paper": "https://power.trade/fuel-token/",
+    "short_description": "DAO token which governs the treasury that covers PowerTrade traders in the event of a black swan.",
+    "description": "The PowerTrade Fuel Token (PTF) is a DAO token which governs the treasury that covers PowerTrade traders in the event of a black swan.",
+    "explorer": "https://etherscan.io/token/0xC57d533c50bC22247d49a368880fb49a1caA39F7"
+}