feat: add berachain and berachain-bepolia chains (#7343)

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## PR-Codex overview
This PR introduces the `berachain` and `berachainBepolia` blockchain definitions to the `thirdweb` package, enhancing its chain support. It also updates the `chains` export file to include these new chains.

### Detailed summary
- Added `berachain` and `berachainBepolia` definitions in their respective files.
- Updated `packages/thirdweb/src/exports/chains.ts` to export `berachain` and `berachainBepolia`.
- Defined `berachain` with an ID of 80094 and a native currency of `BERA`.
- Defined `berachainBepolia` with an ID of 80069, marked as a testnet.

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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **New Features**
  - Added support for the Berachain mainnet and Berachain Bepolia testnet networks, including native currency details and integrated block explorers for enhanced network visibility.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: Yash094

.changeset/spicy-cooks-smoke.md

@@ -0,0 +1,5 @@
+---
+"thirdweb": minor
+---
+
+add berachain and berachain testnet in chains package

packages/thirdweb/src/chains/chain-definitions/berachain-bepolia.ts

@@ -0,0 +1,17 @@
+import { defineChain } from "../utils.js";
+
+/**
+ * @chain
+ */
+export const berachainBepolia = /* @__PURE__ */ defineChain({
+  id: 80069,
+  name: "Berachain Bepolia",
+  nativeCurrency: { name: "BERA", symbol: "BERA", decimals: 18 },
+  blockExplorers: [
+    {
+      name: "beratrail",
+      url: "https://bepolia.beratrail.io/",
+    },
+  ],
+  testnet: true,
+});

packages/thirdweb/src/chains/chain-definitions/berachain.ts

@@ -0,0 +1,17 @@
+import { defineChain } from "../utils.js";
+
+/**
+ * @chain
+ */
+export const berachain = /* @__PURE__ */ defineChain({
+  id: 80094,
+  name: "Berachain",
+  nativeCurrency: { name: "BERA", symbol: "BERA", decimals: 18 },
+  blockExplorers: [
+    {
+      name: "berascan",
+      url: "https://berascan.com/",
+      apiUrl: "https://api.berascan.com/api",
+    },
+  ],
+});

packages/thirdweb/src/exports/chains.ts

@@ -83,3 +83,5 @@ export { soneiumMinato } from "../chains/chain-definitions/soneium-minato.js";
 export { treasure } from "../chains/chain-definitions/treasure.js";
 export { treasureTopaz } from "../chains/chain-definitions/treasureTopaz.js";
 export { monadTestnet } from "../chains/chain-definitions/monad-testnet.js";
+export { berachain } from "../chains/chain-definitions/berachain.js";
+export { berachainBepolia } from "../chains/chain-definitions/berachain-bepolia.js";