Adding all headers to io.kinemetrics (12 channel version)

[ThomasLecocq]

What does this PR do?

Reads and processes ALL header parameters from EVT files

Why was it initiated? Any relevant Issues?

A quest to be exhaustive (and a question from an user)

PR Checklist

• Correct base branch selected? master for new features, maintenance_... for bug fixes
• This PR is not directly related to an existing issue (which has no PR yet).
• All tests still pass.
• Any new features or fixed regressions are be covered via new tests.
• Any new or changed features have are fully documented.
• Significant changes have been added to CHANGELOG.txt .

TODO:

• check the translation of a few bits to "real value"
• add tests (get an external code to output the header values from the test files)
• add info to the documentation

IDEALLY:

• restructure the header reading part, but that's not essential

[ThomasLecocq]

🔴 do not merge, I have to revert the passing of apply_calib #2935