Add update experiment config docs and automated workflows

[jo-basevi]

This PR:

• Adds the update experiment config guide which is largely the contents of the issue Updating experiment info in the website experiment configuration #65
• Adds a workflow sync_experiments.yml which automatically adds experiment UUIDs to the CMIP7 experiments table in the tracking services DB (so we can access the payu telemetry summary via the public endpoint for the dashboard).
• Adds json schema and workflow for validating the experiment config file in pull requests.

The sync_experiments.yml workflow effectively just posts the json objects to tracking-services if there isn't already a UUID present in the table:

{
    "experiment_uuid": "16897734-4456-4279-91f9-b3389d6a7673",
    "experiment_name": "esm-historical-r27i1p1f1",
}

Previously the name was directory names in the synced location on NCI, but as the experiment_name isn't used anywhere currently, it can be changed. So now it'll use the name (+ the name for ensemble/related experiment) in the public/experiment-config.json.

I have tested the current public/experiment-config.json passes the schema check, and I've tested the python script for updating the DB on a local tracking-services instance.

TODO:

• Add GitHub secrets for TS_API_BASE_URL and TS_API_TOKEN

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.67%. Comparing base (82cd143) to head (1377f42).

Additional details and impacted files

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##             main      #66   +/-   ##
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  Coverage   88.67%   88.67%           
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  Files          55       55           
  Lines        2553     2553           
  Branches      385      385           
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  Hits         2264     2264           
  Misses        289      289           

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[charles-turner-1]

Looks good to me!