Migrate to typescript

[MichaelJamesParsons]

Description

Now that titan has reached a more stable state, it's time to go back and optimize the code base to ensure it scales gracefully. There are a few upcoming tasks that mandate strong types to be reliably implemented (e.g. API client codegen #174). This task will mark the beginning of a long-term effort toward migrating to TypeScript.

Requirements/Expected Behavior

• Reconfigure webpack and babel
• Implicit any types should trigger a warning. We'll fix these warnings over time. Once they're all resolved, implicit any types will trigger an error instead.