Add perfSONAR Toolkit (RPM) installation guide

[ShawnMcKee]

Overview

This PR adds a comprehensive installation guide for perfSONAR Toolkit using RPM packages, complementing the existing container-based Testpoint guide. Sites can now choose between two deployment models based on their requirements.

What's New

New Documentation

• docs/personas/quick-deploy/install-perfsonar-toolkit.md (1,305 lines)
  • Complete toolkit installation guide adapted from testpoint
  • RPM-based installation using dnf install perfsonar-toolkit
  • Native systemd service management
  • Web UI setup at https://hostname/toolkit
  • Local measurement archive configuration
  • All commands adapted from container to native filesystem/service access

Updated Documentation

• docs/personas/quick-deploy/landing.md: Added deployment type comparison with feature lists
• mkdocs.yml: Restructured navigation with 'Installation Guides' submenu
• docs/index.md: Updated to mention both deployment options
• docs/perfsonar-in-osg.md: Added links to both installation guides
• docs/perfsonar/deployment-models.md: Enhanced Toolkit vs Testpoint comparison
• docs/perfsonar/installation.md: Updated legacy notice to reference both guides

Key Differences: Testpoint vs Toolkit

Feature	Testpoint (Container)	Toolkit (RPM)
Installation	Container images	RPM packages
Web UI	None	https://hostname/toolkit
Archive	Remote only	Local OpenSearch + Logstash
Updates	Container pulls	dnf-automatic
Management	podman exec	Direct systemctl
Resources	Lightweight	Full-featured

Structure

The toolkit guide follows the same 8-step structure as testpoint:

1. Step 1: Install and Harden EL9 (unchanged)
2. Step 2: ✨ Rewritten - RPM installation instead of containers
3. Step 3: Configure PBR (unchanged - works for both)
4. Step 4: Security configuration (noted as pre-configured by toolkit)
5. Step 5: ✨ Rewritten - Service verification and web UI setup
6. Step 6: pSConfig enrollment (adapted with web UI option)
7. Step 7: WLCG/OSG registration (adapted with web UI option)
8. Step 8: Validation (adapted all container commands to native)

Testing

✅ Site builds successfully: check_site_for_backticks.py --build returns OK
✅ No visible backticks in generated HTML
✅ All navigation links updated and working
✅ 1,418 insertions across 7 files

Reviewers

Please review:

• Technical accuracy of RPM installation steps
• Consistency with upstream perfSONAR docs at https://docs.perfsonar.net/install_el.html
• Clarity of deployment type comparison on landing page
• Navigation structure in mkdocs.yml

Related Issues

This addresses the need for clear documentation of both deployment models, allowing sites to choose the appropriate option based on their requirements (lightweight testpoint vs full-featured toolkit).