feat: Adds new config option: connectionString

[scalvert]

Summary

The docusaurus-plugin-application-insights plugin's current options include only the instrumentationKey option, which is slated for deprecation in 2025. This PR adds support for Connection strings, which is the new way to define where to send telemetry data.

New options type:

export type ApplicationInsightsOptions = {
    instrumentationKey: string;
    connectionString: string;
};

These options are mutually exclusive.

[pelikhan]

@scalvert do you want me to merge?

[scalvert]

I'll merge it! Thanks for the review!

[github-actions[bot]]

:tada: This PR is included in version @rise4fun/docusaurus-plugin-application-insights-v1.3.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: