✨ add support for us healthcare card and update products

[sebastianMindee]

Description

• ✨ add support for us healthcare card
• ✨ update invoice to 4.7
• ✨ update financial document to 1.9 & add documentation for async
• ✨ add support for boolean fields
• 🐛 fix invalid display when trying to cast null amountfields into string
• ♻️ fill in many missing product imports
• 📝 fix miscellaneous typos & outdated doc

Related Issue

How Has This Been Tested

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Requires a change to the official Guide documentation.