climate recipes deleted and note on pre-processing in implementation

[vgro]

This PR removes the climate recipes that are not really very useful now that we broadened the scope to all ecosystems. I move some useful links and checks to the implementation sections of abiotic_simple and abiotic.

https://virtual-ecosystem.readthedocs.io/en/525-climate-data-resources-are-outdated-and-need-to-be-revisited/virtual_ecosystem/implementation/abiotic_simple_implementation.html

I promise this is the last docs PR for a bit ;-)

Fixes #525

Type of change

• [x] New feature (non-breaking change which adds functionality)
• [ ] Optimization (back-end change that speeds up the code)
• [ ] Bug fix (non-breaking change which fixes an issue)

Key checklist

• [x] Make sure you've run the pre-commit checks: $ pre-commit run -a
• [ ] All tests pass: $ poetry run pytest

Further checks

• [ ] Code is commented, particularly in hard-to-understand areas
• [ ] Tests added that prove fix is effective or that feature works
• [x] Relevant documentation reviewed and updated

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.93%. Comparing base (a51551a) to head (7cc4fcc).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #526 +/- ## ======================================== Coverage 94.93% 94.93% ======================================== Files 73 73 Lines 4048 4048 ======================================== Hits 3843 3843 Misses 205 205 ```

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