Make set_icc_profile function accessible

[misl-smlz]

The set_icc_profile function for WebP images is currently not available for external use. This issue proposes making the function accessible for users outside the internal code, allowing them to set ICC profiles when processing WebP images. This change would improve the flexibility and usability of the library, particularly in scenarios where ICC profiles are needed.

Related PR: #2322

Steps to Reproduce:
N/A

Expected Behavior:
Users can access the set_icc_profile function externally.

Actual Behavior:
The function is not currently accessible.

Possible Solution:
Implement the change outlined in PR #2322.