Rust bindings high level crate

[Choochmeque]

Description

Contributor Declaration

By opening this pull request, I affirm the following:

• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

📋 Metkit Documentation 📋
https://sites.ecmwf.int/docs/metkit/pull-requests/PR-244

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.77%. Comparing base (dc27e06) to head (b343da6).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #244   +/-   ##
========================================
  Coverage    50.77%   50.77%           
========================================
  Files          385      385           
  Lines        15522    15522           
  Branches      1314     1314           
========================================
  Hits          7882     7882           
  Misses        7640     7640           

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