Add H2 Chain Mainnet(chainId 2852) and Testnet (chainId 28521) (#7924)

* Add H2 chains

* update short name

Author: wluisw

_data/chains/eip155-2582.json

@@ -0,0 +1,23 @@
+{
+  "name": "H2 Chain Mainnet",
+  "chain": "H2",
+  "rpc": ["https://rpc.h2chain.io"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "H2 Chain Native Token",
+    "symbol": "H2",
+    "decimals": 18
+  },
+  "infoURL": "https://h2chain.io",
+  "shortName": "h2",
+  "chainId": 2582,
+  "networkId": 2582,
+  "icon": "h2",
+  "explorers": [
+    {
+      "name": "h2scan",
+      "url": "https://h2scan.io",
+      "standard": "EIP3091"
+    }
+  ]
+}

_data/chains/eip155-25821.json

@@ -0,0 +1,23 @@
+{
+  "name": "H2 Chain Testnet Lambda",
+  "chain": "H2",
+  "rpc": ["https://rpc.h-1.io"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Lambda H2",
+    "symbol": "H2",
+    "decimals": 18
+  },
+  "infoURL": "https://h2chain.io",
+  "shortName": "h2-lambda",
+  "chainId": 25821,
+  "networkId": 25821,
+  "icon": "h2",
+  "explorers": [
+    {
+      "name": "h2scan-lambda",
+      "url": "https://lambda.h2scan.io",
+      "standard": "EIP3091"
+    }
+  ]
+}

_data/icons/h2.json

@@ -0,0 +1,8 @@
+[
+  {
+    "url": "ipfs://bafkreiehobxmonxuwg3wukea4ixbixap7imzk4yuiidyejzpvgdylok4ua",
+    "width": 512,
+    "height": 512,
+    "format": "png"
+  }
+]