feat(#zimic): support to URLs in typegen (#247)

[diego-aquino]

Features

• [#zimic] Added support to an URL as input to zimic typegen openapi. If the input could not be parsed as a URL, a file path is assumed.

Fixes

• [#zimic] Changed the import module from zimic to zimic/http in generated typescript files.

Refactoring

• [#zimic] Simplified typegen import logic in development and tests.

Closes #247.

[github-actions[bot]]

Released in v0.8.0 :tada:

• :pushpin: Release notes
• :package: NPM package