Improve docs clarity and usability

[LordGhostX]

This PR improves Juno's documentation, enhancing the structure, navigation, and user experience. Below is a list of the tasks completed:

• Build a script to extract Juno’s config from the codebase generate-config.js
• Integrate the script to generate the config table and embed it in the docs automatically
• Add a locally indexed search bar with https://github.com/easyops-cn/docusaurus-search-local
• Migrate Docusaurus from v2 to v3: https://docusaurus.io/docs/migration/v3
• Organise versioning and include instructions in the README
• Organise the footer (add blog, release notes, config links)
• Remove the autogenerated sidebar and map it manually
• Change the docs font to MD Sans (Juno’s brand secondary font)
• Rewrite the Juno Configuration guide and include environment variables instructions
• Rewrite the Database Snapshots guide
• Rewrite the Hardware Requirements guide and increase minimum storage to 250GB
• Rewrite the Running Juno on GCP guide with updated screenshots
• Create a Juno intro page
• Create a Frequently Asked Questions (FAQ) page
• Create a Running Juno guide
• Rewrite the Updating Juno guide
• Create an Interacting with Juno guide (JSON-RPC and WebSocket)
• Reference the Starknet API reference and request builder
• Create a Monitoring Juno guide
• Update snapshot to block 640855
• Implement feedback from the cairo-native team

Preview: https://juno.nethermind.io/next/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.47%. Comparing base (3d16548) to head (05d8d2d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1857      +/-   ##
==========================================
+ Coverage   75.30%   75.47%   +0.16%     
==========================================
  Files          97       97              
  Lines        8333     8333              
==========================================
+ Hits         6275     6289      +14     
+ Misses       1522     1514       -8     
+ Partials      536      530       -6     

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[stranger80]

LGTM in preview mode