Route coins to address-balance + dependency cleanup

[11felix]

Route coins to address-balance

• Route coins to the recipient's address balance in mint, redeem, and fee flows; add supporting helper in common/utils.ts.

Dependency cleanup

• Move jest, ts-jest, and typedoc from dependencies to devDependencies — test/docs tooling that consumers shouldn't install at runtime.
• Add tslib to dependencies — required by importHelpers: true but previously undeclared.