docs: comprehensive wiki documentation for git-adr Add complete end-user documentation including: - Home: Overview with quick start and navigation - Getting Started: Installation, setup, and first ADR guide - Commands Reference: Complete command documentation - Configuration Guide: All configuration options - ADR Templates: Six template formats with comparison - Shell Completion: Setup for bash/zsh/fish/PowerShell - AI Features: AI-powered drafting, suggestions, Q&A - Wiki Integration: GitHub/GitLab wiki sync - Architecture Decisions: Project own ADRs catalog - FAQ: Common questions and troubleshooting - Updated sidebar with organized navigation

zircote committed Dec 15, 2025