Add extension for CES

[nefrathenrici]

Purpose

To-do

Content

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• [ ] I have read and checked the items on the review checklist.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 79.16667% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 42.91%. Comparing base (5f1f6f3) to head (af1d28b). Report is 1 commits behind head on main.

Files	Patch %	Lines
src/emulate_sample.jl	0.00%	5 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #85 +/- ## ========================================== - Coverage 43.82% 42.91% -0.92% ========================================== Files 5 6 +1 Lines 235 240 +5 ========================================== Hits 103 103 - Misses 132 137 +5 ```

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