Integrate Snowplow plugins with JS SDK

https://gitlab.com/gitlab-org/analytics-section/product-analytics/gl-application-sdk-js/-/issues/18

I have added below plugins in this MR,

1. Client Hints
2. Form tracking
3. Link Click tracking
4. Performance Timing
5. Error Tracking

Pending Plugins

1. Consent and Enhanced Consent - This requires a bit more wider discussion and can be added later.

Shall we also add GA cookies as well? It is currently enabled for GitLab