Fix #4758: Add comprehensive documentation for adding/removing challenge hosts and participants

[vennelavarshini18]

Fixes #4758

Overview

This PR improves the EvalAI documentation by adding clear and structured guides for managing challenge hosts and participant teams. These updates help both new contributors and challenge organizers understand how to add/remove hosts and challenge participants through the Web UI and API.

Changes Introduced

1. Challenge Host Management Documentation

• Added new page: challenge-host-management.md under 02-for-challenge-hosts/hosting-guide/
• Includes detailed instructions for:
  • Adding a challenge host
  • Removing a challenge host
  • Managing hosts using Web UI and REST API

2. Updates to Navigation Index

• Updated 02-for-challenge-hosts/hosting-guide/index.md to include the new documentation page.

3. Participant Team Management Improvements

• Updated 03-for-participants/participation-guide/team-management.md with enhanced formatting and clearer explanations.

Testing

• Built Sphinx docs locally using make html
• Verified all new pages render properly
• Navigation links appear correctly in the sidebar
• Confirmed no broken links or warnings during build

Additional Notes

• No backend or frontend code changes.
• Pure documentation improvements only.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.90%. Comparing base (d4ce4fa) to head (cdef011).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4816      +/-   ##
==========================================
+ Coverage   91.89%   91.90%   +0.01%     
==========================================
  Files          86       86              
  Lines        7132     7132              
==========================================
+ Hits         6554     6555       +1     
+ Misses        578      577       -1     

Flag	Coverage Δ
backend	96.67% <ø> (ø)
frontend	87.17% <ø> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
Accounts & Authentication	100.00% <ø> (ø)
Challenges Management	95.39% <ø> (ø)
Job Processing	98.19% <ø> (ø)
Participants & Teams	100.00% <ø> (ø)
Challenge Hosts	100.00% <ø> (ø)
Analytics	100.00% <ø> (ø)
Web Interface	100.00% <ø> (ø)
Frontend (Gulp)	87.17% <ø> (+0.02%)	⬆️
All Models	97.58% <ø> (ø)
All Views	100.00% <ø> (ø)
All Serializers	98.82% <ø> (ø)
Utility Functions	96.82% <ø> (ø)
Core Configuration	82.35% <ø> (ø)
see 1 file with indirect coverage changes
see 1 file with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d4ce4fa...cdef011. Read the comment docs.

🚀 New features to boost your workflow:

• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.