Add Cash and Escrow Account Types

[jwaspin]

Summary

This pull request expands the supported financial account types by introducing CASH and ESCROW as valid account types throughout the schema, documentation, and example data. It also adds corresponding test cases to ensure these new types are properly validated.

Schema and Validation Updates:

• Added CASH and ESCROW to the allowed values for the AccountType enum in src/schemas/enums.json, ensuring these types are recognized as valid account types.
• Updated the account type definition in the documentation (README.md) to include CASH and ESCROW.

Example Data Updates:

• Added example accounts of type CASH and ESCROW to src/examples/accounts.json and src/examples/lucaSchema.json. [1] [2]
• Updated examples/luca-schema-example.json with new sample accounts for CASH and ESCROW.

Testing:

• Added tests to validate that accounts with type CASH and ESCROW are accepted by the schema in src/tests/account.test.js.

Versioning:

• Bumped the package version to 3.1.0 to reflect the addition of new account types.

Changes

• Introduced new account types: CASH and ESCROW in the schema.
• Updated examples and tests to include the new account types.
• Bumped version to 3.1.0 in package.json.

Checklist

• Increment Version in package.json (semantic versioning)
• Updated README or documentation if needed
• Updated changelog if needed
• Updated/added tests if needed
• Updated/added examples if needed
• Ran pnpm test, all tests pass
• Ran pnpm lint