Feature/replace dim x with identifier

[jwasikpsnc]

• added new keys to plot_data response coordinates dict:
  • alias - alias to the coordinate name e.g. R for dim1 (depends on identifier)
  • unit_alias - alias to coordinate unit. Currently always None (waiting for new DataDictionary and IMAS-Python release):
    • DD PR: [issue-262] Add metadata for plotting 2D equilibrium in the poloidal_… IMAS-Data-Dictionary#263
    • IMAS-Python PR: Add units metadata to Identifiers IMAS-Python#131
• added tests

@mfiaudrin-epsyl FYI: keys in the response are always there, if there is no alias, then alias=None

Example response:

"coordinates": [
      {
        "name": "dim1",
        "alias": "R",
        "target": "#equilibrium/time_slice[0]/profiles_2d[0]/psi",
        "unit": "mixed",
        "unit_alias": null,
        "shape": [
          65
        ],
        ...
    }

[read-the-docs-community]

Documentation build overview

📚 imas-ibex | 🛠️ Build #33110008 | 📁 Comparing 1eb853d against latest (b84903c)

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• index.html
• users_manual/features.html
• users_manual/how_to_launch.html
• developers_manual/backend_development/adding_new_data_source.html
• developers_manual/backend_development/adding_new_downsampling_method.html
• developers_manual/backend_development/api-hidden.html
• developers_manual/backend_development/api.html
• developers_manual/backend_development/backend_development.html
• developers_manual/backend_development/backend_development_introduction.html
• developers_manual/backend_development/benchmarking.html
• and 38 more...

[jwasikpsnc]

Alias is now put into "name" response field.
No changes on FE side needed.