Add Huobi ECO Chain blockchain (#13324)

* Create info.json

* Create logo.png

* Fixes (sanity and consistency, auto), history

* Create allowlist.json

* Create denylist.json

* Update info.json

* Update info.json

* Fixes (sanity and consistency, auto), history

* Delete logo.png

* Delete info.json

* Delete denylist.json

* Delete allowlist.json

* Create logo.png

* Create info.json

* Create denylist.json

* Create allowlist.json

* Update logo.png

Co-authored-by: Cryptocool1 <Cryptocool1@users.noreply.github.com>

blockchains/heco/allowlist.json

@@ -0,0 +1 @@
+[]

blockchains/heco/denylist.json

@@ -0,0 +1 @@
+[]

blockchains/heco/info/info.json

@@ -0,0 +1,20 @@
+{
+    "name": "Huobi ECO Chain",
+    "website": "https://www.hecochain.com/en-us/",
+    "description": "HECO is a decentralized and cost efficient public chain that Ethereum developers can easily get started with and smart contracts are seamlessly compatible.",
+    "explorer": "https://hecoinfo.com/",
+    "symbol": "HT",
+    "type": "coin",
+    "decimals": 18,
+    "status": "active",
+    "links": [
+        {
+            "name": "twitter",
+            "url": "https://twitter.com/HECO_Chain"
+        },
+        {
+            "name": "telegram",
+            "url": "https://t.me/Huobiecochainofficial"
+        }
+    ]
+}