Initial complete release of the tutorial

What's included

• 12 tasks covering NETCONF and gNMI configuration
  across Nokia SR Linux and Arista cEOS
• Concepts section: YANG, NETCONF, gNMI, RESTCONF,
  XML anatomy, gNMI paths, protocol comparison
• Reference section: command quick reference,
  configuration techniques, pyang guide, tools, scripts
• OSPF configuration and verification tasks
• gNMI streaming telemetry introduction

Lab environment

• Nokia SR Linux 25.10.1
• Arista cEOS 4.35.1F
• Containerlab (current)