add docs on bridging and token addresses

docs/governance/litkey/bridging-and-addresses.mdx

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+---
+title: "Bridging and Contract Addresses"
+---
+
+## Bridging
+
+Use the [Hyperlane Nexus Bridge](https://nexus.hyperlane.xyz/) for fast bridging of LITKEY to all the networks listed in the table below.
+
+
+## Official Contract Addresses
+
+| Contract | Network      | Address                                    | Notes                                                                                    |
+|----------|--------------|--------------------------------------------|------------------------------------------------------------------------------------------|
+| LITKEY   | Ethereum     | 0x4D4eb0E8B160f6EbF63cC6d36060ffec09301B42 | Master token contract                                                                    |
+| LITKEY   | Base         | 0xF732A566121Fa6362E9E0FBdd6D66E5c8C925E49 | Bridged to Base using canonical bridge, Hyperlane supported via collateral token         |
+| LITKEY   | Arbitrum One | 0xC7603786470F04D33E35f9E9B56bD0Ca8803fB95 | Bridged to Arbitrum One using canonical bridge, Hyperlane supported via collateral token |
+| LITKEY   | Optimism     | 0x0633E91f64C22d4FEa53dbE6e77B7BA4093177B8 | Bridged to Optimism using canonical bridge, Hyperlane supported via collateral token     |
+| LITKEY   | Polygon      | 0x5bEd1A06b26853360D9D1a6a27eaCE1b85206867 | Hyperlane synthetic token                                                                |
+| LITKEY   | BSC          | 0x0bBeA6812fb3fcBcA126eDb558e551B3f1702026 | Hyperlane synthetic token                                                                |
+| LITKEY   | Avalanche    | 0xa38Fce8bf2fA38a97749332724b9db3FF44F006D | Hyperlane synthetic token                                                                |
+| LITKEY   | Linea        | 0x94930Cbfed2483b69DfBed9d96a9CdD7c27D1393 | Hyperlane synthetic token                                                                |
+| LITKEY   | Lit Chain    | N/A                                        | Native gas token for Lit Chain                                                           |

docs/governance/litkey/lit-chain.mdx

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+import AddLitChainButton from "/snippets/AddLitChainButton";
+
+---
+title: "Lit Chain"
+---
+
+
+Lit Chain is an Arbitrum Orbit-based L3 rollup that acts as the shared state layer for Lit Protocol.  
+
+## Connecting to Lit Chain
+
+To connect to Lit Chain, you can click <AddLitChainButton /> or manually add the network parameters below.  For production use cases, you should get a free private RPC URL from Conduit by clicking "Get an API Key" on the [Lit Chain hub page](https://hub.conduit.xyz/lit-chain-1rw3jdu82h).
+
+:::note
+The below and additional chain facts are available [here](https://hub.conduit.xyz/lit-chain-1rw3jdu82h).
+:::
+
+| Parameter Name     | Value                                              |
+|--------------------|----------------------------------------------------|
+| Chain ID           | 175200                                             |
+| Name               | Lit Chain                                          |
+| RPC URL            | https://lit-chain-rpc.litprotocol.com              |
+| Block Explorer URL | https://lit-chain-explorer.litprotocol.com         |
+| Currency Symbol    | LITKEY                                             |
+| Currency Decimals  | 18                                                 |

docs/snippets/AddLitChainButton.jsx

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+import React from 'react';
+
+export default function AddLitChainButton() {
+  const addNetwork = () => {
+    const params = [
+      {
+        chainId: '0x2AC60',
+        chainName: 'Lit Chain',
+        nativeCurrency: {
+          name: 'Lit Protocol',
+          symbol: 'LITKEY',
+          decimals: 18,
+        },
+        rpcUrls: ['https://lit-chain-rpc.litprotocol.com'],
+        blockExplorerUrls: [
+          'https://lit-chain-explorer.litprotocol.com',
+        ],
+      },
+    ];
+
+    window.ethereum
+      .request({ method: 'wallet_addEthereumChain', params })
+      .then(() => console.log('Success'))
+      .catch(error => console.log('Error', error.message));
+  };
+
+  return (
+    <button onClick={addNetwork}>Add Lit Chain to Metamask</button>
+  );
+}