Dynamic WUE / PUE / carbon intensity data

Is your feature request related to a problem? Please describe.
Currently, data used to estimate the carbon impact ouf of electrical consumption is stored in the package, stored manually.
CPU references & their TDP values are often requested by users, and must be integrated in a manual way.
Data center carbon impact & global energy mix values are updated at most yearly when we get the data, with heterogeneous sources.

Describe the solution you'd like
A clear process to update data, which can be applied to the following paramters :

• Datacenter PUE, when available
• Location-based energy mix
• Country-based energy mix
• Datacenter WUE
• Processors TDP
• Other ?

It could be exposed to the user via multiple ways :

• Make it available through the public API, and make the OnlineTracker query it periodically
• Export a new version of the datasets at each release, for a full offline fallback
• Other ?

Both ways would require an ingestion task, which could be automated quite easily.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Could help solving following issues: #894, #513, #503, #435, #403 (with a better support / doc of electricitymaps), #384, #365, #336, #222, #138

What could be interesting data sources ?

Start by locating the package's manually stored carbon, energy-mix, PUE, WUE, and processor TDP data. Review how the public API, OnlineTracker, release datasets, and any existing ingestion task could expose or update it. Done requires an agreed update process and a defined choice between online access, release exports, or both.