Add Berachain support to SDK

[pratham-bhatnagar]

Closes #1127

Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• My change requires changes to the documentation.
• I have updated the documentation accordingly.
• This PR does not contain plagiarized content.
• The title of my pull request is a short description of the requested changes.

[github-actions]

The code in the specified files looks good.

[github-actions]

All looks good.

[github-actions]

There are some issues found in the code:

1. In .husky/pre-commit, the script should include shebang at the top #!/bin/sh and correct the yarn commands to include run before the script name, for example yarn run cleanbuild, yarn run nx affected --target=lint, yarn run nx affected --target=test.

2. In packages/examples/sdk-frontend-react/src/app/components/Connect.tsx, the StyledButton and Connect styled components are missing closing curly braces }. Also, the Disconnect styled component should have a closing curly brace as well.

3. In packages/examples/sdk-frontend-react/src/app/helpers.ts, the AddressValidatorsType interface is missing a closing curly brace }. The isValidETHAddress function is missing a closing curly brace }. Additionally, the validateCAIP function is missing a closing curly brace }.

4. In packages/restapi/src/lib/config.ts, in the definition of berachainTestnet object, the blockExplorers object is missing a closing curly brace }.

5. In packages/restapi/src/lib/constants.ts, the Constants object is missing a closing curly brace } at the end.

Once these fixes are applied, the code should be reviewed again.

[github-actions]

There are a few issues found in the code:

1. In the .husky/pre-commit file, the yarn cleanbuild command should be yarn build or yarn clean && yarn build depending on the intended behavior.

2. In the packages/examples/sdk-frontend-react/src/app/components/Connect.tsx file, the StyledButton component is missing a closing curly brace for the styled.button CSS definition.

3. In the packages/examples/sdk-frontend-react/src/app/helpers.ts file, the isValidETHAddress function is missing a closing curly brace. Additionally, the validateCAIP function is missing a closing curly brace in the AddressValidators object.

4. In the packages/restapi/src/lib/config.ts file, the defineChain function for berachainTestnet is missing a closing curly brace and there are missing comma separators between the block explorers and testnet properties.

After fixing the above issues, the code looks good.

All looks good.