Add WireGuard TUI implementation

- Add Go TUI with bubbletea for WireGuard management
- Implement client CRUD operations with QR code generation
- Add configuration and validation modules
- Install/update scripts for client setup
- Update Makefile to build binaries to bin/ directory
- Add .gitignore for Go projects

.agent/README.md

@@ -0,0 +1,30 @@
+# Agent Instructions Directory
+
+This directory contains project-specific instructions for agents working on the wg-admin project.
+
+## Required Reading
+
+All agents MUST read `AGENTS.md` before starting any work.
+
+## Available Instructions
+
+- `AGENTS.md` - Core principles and work discipline (READ THIS FIRST)
+- `beads.md` - Beads workflow and command reference
+- `explore.md` - Instructions for codebase exploration
+- `librarian.md` - Instructions for research and documentation
+- `oracle.md` - Instructions for architecture and debugging
+
+## Agent Workflow
+
+1. Read `.agent/AGENTS.md` for project mandates
+2. Read agent-specific instructions (e.g., `explore.md`)
+3. Execute work following established patterns
+4. Use beads for tracking multi-session or complex work
+5. Run `bd sync` before ending session
+
+## Project Context
+
+- **Issue tracking**: beads/bd CLI
+- **External issues**: Gitea (https://gitea.calmcacil.dev)
+- **Technology**: Bash/shell scripting
+- **Purpose**: WireGuard VPN management tool