feat: Adding callbacks for EffectController (#1926)

[rivella50]

Description

Adds two callback functions to EffectController factory which are invoked before atMaxDuration or atMinDuration runs.

Checklist

• [x] The title of my PR starts with a Conventional Commit prefix (fix:, feat:, docs: etc).
• [x] I have followed the Contributor Guide when preparing my PR.
• [-] I have updated/added tests for ALL new/updated/fixed functionality.
• [x] I have updated/added relevant documentation in docs and added dartdoc comments with ///.
• [-] I have updated/added relevant examples in examples or docs.

Breaking Change?

No

Migration instructions

If the PR is breaking, uncomment this header and add instructions for how to migrate from the currently released version to the new proposed way.

• [ ] Yes, this PR is a breaking change.
• [x] No, this PR is not a breaking change.

Related Issues

Closes #1926