Update workflow-diagrams.md

[manjitapandey]

Added user flow diagrams for mapping, validation, project creation and organisation and super admin workflow.

What type of PR is this? (check all applicable)

• 📝 Documentation
• 🧑‍💻 Refactor
• ✅ Test
• 🤖 Build or CI
• ❓ Other (please specify)

Related Issue

Related to #921

Describe this PR

This PR adds the user flow diagrams for mapping, validation, project creation, organization management and super admin workflow.

Screenshots

Review Guide

Notes for the reviewer. How to test this change?

Checklist before requesting a review

• 📖 Read the FMTM Contributing Guide: https://github.com/hotosm/fmtm/blob/main/CONTRIBUTING.md
• 📖 Read the HOT Code of Conduct: https://docs.hotosm.org/code-of-conduct
• 👷‍♀️ Create small PRs. In most cases, this will be possible.
• ✅ Provide tests for your changes.
• 📝 Use descriptive commit messages.
• 📗 Update any related documentation and include any relevant screenshots.

[optional] What gif best describes this PR or how it makes you feel?

[spwoodcock]

The figma diagrams need to be made public (they are currently behind login)

[manjitapandey]

Fixing markdown lint issue and also making the figma diagram public

[spwoodcock]

Do you think we should just link to them, or would it be nice to embed them in our docs page as discussed?

You can follow the guide here if so:
https://figmafy.com/embed-figma-prototype-in-website/

Basically just:

• Click 'share'
• Select 'embed'
• Copy the embed code in place of the link in the markdown

You could check it works correctly by copying the markdown file content here: https://markdownlivepreview.com/

[spwoodcock]

With the embedded iframes it looks like this:

https://docs.fmtm.dev/manuals/workflow-diagrams/