feat: provide putCustomContext API support

[1abhishekpandey]

Description of the change

• Added the functionality to set customContext through the options object both while initializing the SDK and when making any events, such as track.
• Here is the options object:

  {
  externalIds: [
  {
    id: '2d31d085-4d93-4126-b2b3-94e651810673',
    type: 'brazeExternalId',
  },
  ],
  integrations: {
  // specifying destination by its display name
  Amplitude: true,
  Mixpanel: false,
  },
  tier: {
  category: 'premium',
  type: 'gold',
  },
  account: {
  level: 'standard',
  membership: 'silver',
  },
  };

Type of change

• [ ] Bug fix (non-breaking change that fixes an issue)
• [x] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

Fix [#1]()

Checklists

Development

• [ ] Lint rules pass locally
• [ ] The code changed/added as part of this pull request has been covered with tests
• [ ] All tests related to the changed code pass in development

Code review

• [ ] This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• [ ] "Ready for review" label attached to the PR and reviewers mentioned in a comment
• [ ] Changes have been reviewed by at least one other engineer
• [ ] Issue from task tracker has a link to this pull request

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud