Fix JVM port bind exception and add custom port support

[sunildhiman90]

This PR resolves the java.net.BindException occurring on the JVM platform when the default port (8080) is already in use.

Changes:

• Added googleClientRedirectHost and googleClientRedirectScheme to KMAuthConfig to allow custom port configuration.
• Updated GoogleAuthManagerJvm to use the configured port and added specific error handling for BindException.
• Removed automatic port scanning to avoid confusing redirect_uri_mismatch errors in the browser.
• Updated documentation with instructions on matching the app port with the Google Cloud Console.
• Version bump to 0.3.5.

Fixes #12