feat(login): add help link

[ivikash]

Problem

Add Help link in Login Page.

Solution

• Introducing BEM naming convention for classes/CSS - https://getbem.com/.
• Use ? for icon.
• Record Telemetry data when a user clicks the help link.

TODO

• UX Review

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jparkhurst3]

LGTM

[ivikash]

Dark Theme	Light Theme

[ivikash]

2024-05-07 11:36:51.226 [debug] Webview called command "storeMetricMetadata" with args: [ { region: 'us-east-1' } ]
2024-05-07 11:36:54.203 [debug] Webview called command "emitUiClick" with args: [ 'auth_helpLink' ]
2024-05-07 11:36:54.203 [debug] telemetry: ui_click {
  Metadata: {
    elementId: 'auth_helpLink',
    awsAccount: 'not-set',
    awsRegion: 'us-east-1'
  },
  Value: 1,
  Unit: 'None',
  Passive: false
}