feat: campaigns api

[vishalnarkhede]

CLA

• I have signed the Stream CLA (required).
• Code changes are tested

Description of the changes, What, Why and How?

Changelog

[github-actions]

Size Change: +9.59 kB (+3%)

Total Size: 354 kB

Filename	Size	Change
dist/browser.es.js	76.3 kB	+1.98 kB (+3%)
dist/browser.full-bundle.min.js	46.5 kB	+1.54 kB (+3%)
dist/browser.js	77.3 kB	+2.04 kB (+3%)
dist/index.es.js	76.3 kB	+1.99 kB (+3%)
dist/index.js	77.4 kB	+2.04 kB (+3%)

_{compressed-size-action}