TypeScript improvements

[jasonpaulos]

This PR improves TypeScript generation in a few ways:

• Indexer types are now generated. These types are treated as completely separate from algod types and they live in a different file.
• A static method fromParsedJSON has been added to each generated model class. This method allows JSON responses to be turned into our generated class types.
• Small bugfix: arrays of integer types used to be incorrectly built as number | bigint[], but they are now correctly built as (number | bigint)[].
• Quality of life: the JS SDK formatter is now ran automatically after code generation.

The changes here were used to generate the code in https://github.com/algorand/js-algorand-sdk/pull/663 and https://github.com/algorand/js-algorand-sdk/pull/662

[michaeldiamant]

Since @jasonpaulos is OOO for the week, leaving a note to broadcast sequencing suggestion:

• Merge https://github.com/algorand/js-algorand-sdk/pull/665
• Merge this PR + regenerate js-algorand-sdk changes for https://github.com/algorand/js-algorand-sdk/pull/662 and https://github.com/algorand/js-algorand-sdk/pull/663.