Add Gravity Alpha Mainnet (ethereum-lists#5118)

* feat: Add Gravity Alpha Mainnet (#1)

* feat: Add Gravity Alpha Mainnet

* chore: update chain id to 1625

* chore: update chain info

* Update eip155-71.json

* chore: add parent chain info

* fix: gravity parent chain

* chore: format gravity json

* fix: url slash

---------

Co-authored-by: ligi <[email protected]>

Author: HaynarCool

_data/chains/eip155-1625.json

@@ -0,0 +1,33 @@
+{
+  "name": "Gravity Alpha Mainnet",
+  "chain": "Gravity",
+  "rpc": ["https://rpc.gravity.xyz"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Gravity",
+    "symbol": "G.",
+    "decimals": 18
+  },
+  "features": [
+    { "name": "EIP155" },
+    { "name": "EIP1559" },
+    { "name": "EIP1108" }
+  ],
+  "infoURL": "https://gravity.xyz",
+  "shortName": "gravity",
+  "chainId": 1625,
+  "networkId": 1625,
+  "icon": "gravity",
+  "explorers": [
+    {
+      "name": "Gravity Alpha Mainnet Explorer",
+      "url": "https://explorer.gravity.xyz",
+      "standard": "EIP3091"
+    }
+  ],
+  "parent": {
+    "type": "L2",
+    "chain": "eip155-1",
+    "bridges": [{ "url": "https://bridge.gravity.xyz" }]
+  }
+}

_data/icons/gravity.json

@@ -0,0 +1,8 @@
+[
+  {
+    "url": "ipfs://QmZR15YFtH3EyQp3V7vPkm8PFyevXs2w3y2Trf2k6ikVQL",
+    "width": 480,
+    "height": 480,
+    "format": "png"
+  }
+]