Break long timers into smaller timers

[kamperiadis]

Issue describing the changes in this PR

Resolves #114 Currently, we do not support timers longer than 7 days. However, the changes in this PR work around that by breaking up a single long timer into several shorter ones.

Pull request checklist

• [x] My changes do not require documentation changes
  • [ ] Otherwise: Documentation issue linked to PR
• [x] My changes are added to the CHANGELOG.md
• [x] I have added all required tests (Unit tests, E2E tests)

[kanupriya15025]

@kamperiadis Is this released in the SDK?