feat: parse eyelink mount config and pupil data type

[theDebbister]

Description

Please include a clear and concise description of the change and which issue is fixed. Please also include excepted improvements, relevant motivation and context. List any dependencies that are required for this change.

Fixes issue #510

Implemented changes

Insert a description of the changes implemented in the pull request.

• [x] added parsing of mount configuration
• [x] added parsing of pupil data type
• [x] more tests for data loss ratio calculation

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change is or requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [ ] unit tests

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] I have checked my code and corrected any misspellings

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (89ff50f) to head (3dc52b1).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #725 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 60 60 Lines 2806 2813 +7 Branches 712 714 +2 ========================================= + Hits 2806 2813 +7 ```

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