Docs: reorganize About Mithril section in docs website

[jpraynaud]

Content

This PR includes significant updates to the About Mithril documentation for Mithril, including new sections and reorganized content. The changes aim to improve the clarity and accessibility of the information for developers and users.

Note

• Screenshots are available on this slideshow

Documentation Reorganization:

• New "Advanced" Section:

  • Added a new "Advanced" section to the documentation to provide detailed insights into Mithril's protocol, phases, certificate chain design, and network architecture. (docs/website/root/mithril/advanced/README.mdx, docs/website/root/mithril/advanced/_category_.json) [1] [2]

• Updated Links in Glossary and Manuals:

  • Updated multiple links in the glossary and manual files to point to the new "Advanced" section. (docs/website/root/glossary.md, docs/website/root/manual/develop/README.mdx, docs/website/root/manual/develop/nodes/mithril-aggregator.md, docs/website/root/manual/develop/nodes/mithril-client-library-wasm.md, docs/website/root/manual/develop/nodes/mithril-client-library.md, docs/website/root/manual/develop/nodes/mithril-client.md, docs/website/root/manual/develop/nodes/mithril-signer.md, docs/website/root/manual/develop/protocol-simulation.md) [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

Configuration Updates:

• Redirects in Docusaurus Config:
  • Added new redirects in the Docusaurus configuration to ensure old URLs point to the new locations in the "Advanced" section. (docs/website/docusaurus.config.js) [1] [2]

Minor Fixes:

• Stack Exchange Link Update:
  • Updated the Stack Exchange link in the README.md and docusaurus.config.js to use a more accurate search query. (README.md, docs/website/docusaurus.config.js) [1] [2]

Pre-submit checklist

• Branch
  • Commit sequence broadly makes sense
  • Key commits have useful messages
• PR
  • No clippy warnings in the CI
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested
• Documentation
  • Update documentation website (if relevant)

Issue(s)

Closes #2154

[github-actions]

Test Results

    4 files  ±0     52 suites  ±0   11m 44s ⏱️ +3s
1 425 tests ±0  1 425 ✅ ±0  0 💤 ±0  0 ❌ ±0 
1 636 runs  ±0  1 636 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit d60d866. ± Comparison against base commit 490e2c9.

♻️ This comment has been updated with latest results.

[olgahryniuk]

A couple of minor suggestions to consider, please.
Thank you!
Looks great on screenshots