Publishing pages update

[u3ks]

Publishing page:

pages changed:

• Contributing to the Open Science Catalog
• OSC/index.md
• ESA PRR/index.md
• Technical Documentation / index.md
• Removed Workflows section and moved under OSC

fixes for:

• How to Publish results section - reference to the open science metadata repository to be updated #111, - replace staging with main
• Step1: Make your data accessible: #106 , Technical Dcumentation: Working with Data - How to publish to Open Science Catalogue #105 - add prr instructions and example
• Protected Data Correction note #58 - protected data and FAIR
• Technical Documentation/ Working with Data/ Publishing Science Results - General #50 - fix STAC Items / OSC items terminology
• Technical Documentation / Working with Data / Publishing Science Results - STEP 3 #49 - simplify publishing explanations, based on the examples and commets.
• Technical Documentation / Working with Data / Publishing Science Results - STEP 2 #45, pages/Technical Documentation/Working with Data/ Publishing Science Results/ STEP 2: Creating the Item Catalog #46 - simplify the STAC explanations, since its not required for the OSC. move to the PRR examples.
• Technical Documentation / Working with Data/ Publishing Science Results - review #42 - general structure.

Additional:

• create a page that gives an OSC overview
• Create a page that gives a PRR overview
• link to the OSC examples and the three options to add OSC artefacts - GUI, Manual, Platforms.
• use the term OSC entry for OSC workflows, data, project product to limit the confusion with STAC items
• Simplified publishing page

[sunnydean]

• Make step 2 more prominent somehow
• Examples should be more visible as they have the actual steps