fix: support typescript storybook config

[jfairley]

Description

Storybook can be configured with typescript files, including main.ts as an alternative to main.js.

This update enables the storybook parser for .storybook/main.ts.

see https://storybook.js.org/docs/api/main-config

[jfairley]

This change alone isn't the full solution for the most common likely configuration. The TS config file also allows a default export, which would require further changes to support, but minimally recognizing the main.ts file is a relevant step forward.