DOC: Add cross-references from tutorials to API

[VeckoTheGecko]

This is a tracking issue for cross linking between tutorials and the API documentation.

Files

• quickstart tutorial ./docs/getting_started/tutorial_quickstart.md
• output tutorial ./docs/getting_started/tutorial_output.ipynb
• conceptual workflow ./docs/getting_started/explanation_concepts.md
• curvilinear grids ./docs/user_guide/examples/tutorial_nemo_curvilinear.ipynb
• spherical grids and unit conversion ./docs/user_guide/examples/tutorial_unitconverters.ipynb
• delayed starts ./docs/user_guide/examples/tutorial_delaystart.ipynb
• kernel loop ./docs/user_guide/examples/explanation_kernelloop.md
• sampling a field ./docs/user_guide/examples/tutorial_sampling.ipynb
• StatusCodes ./docs/user_guide/examples/tutorial_statuscodes.md
• gsw density ./docs/user_guide/examples/tutorial_gsw_density.ipynb
• Argo float ./docs/user_guide/examples/tutorial_Argofloats.ipynb
• Diffusion ./docs/user_guide/examples/tutorial_diffusion.ipynb
• Particle-particle interaction ./docs/user_guide/examples/tutorial_interaction.ipynb
• Interpolator API ./docs/user_guide/examples/explanation_interpolation.md
• parcels.interpolators (done in fix formatting in dt guide and interpolators guide #2441 ) src/parcels/interpolators.py
• timestep and integration method ./docs/user_guide/examples/tutorial_dt_integrators.ipynb

---

Note that #2448 should probably be worked on first so that we can have richer cross linking

@erikvansebille are there any of these tutorials that need major work (hence should be de-prioritised for cross linking for now)?

[erikvansebille]

No, all of these tutorials are 'done' in the sense that they are aligned with v4 so ready to be used. That is the massive work by @reint-fischer the last few months!

[VeckoTheGecko]

Awesome!