refactor(imports): use modern JSON import assertion syntax

Update JSON import to use `with { type: 'json' }` syntax instead of plain import.
This is the modern ESM standard for importing JSON modules with explicit type assertion.

Author: jdalton

src/constants.ts

@@ -3,7 +3,7 @@
  * Provides default values, HTTP agents, and public policy configurations for API interactions.
  */
 
-import rootPkgJson from '../package.json'
+import rootPkgJson from '../package.json' with { type: 'json' }
 import { createUserAgentFromPkgJson } from './user-agent'
 
 import type { ALERT_ACTION, ALERT_TYPE } from './types'