refactor: reorganize into monorepo with separate subprojects

Structure webber into three independent subprojects:
- webber-api/: FastAPI backend server with all agent code
- webber-cli/: Standalone CLI client (renamed from cli/ to webber_cli/)
- webber-sandbox/: Test project for functional testing

Key changes:
- Each subproject has its own .venv (Python 3.12+)
- Added sandbox.sh for managing test project templates
- Created sandbox-templates/ with calculator-cli and empty starter
- Updated CI/CD for prefixed tags (api/v*, cli/v*)
- Added comprehensive AGENTS.md with operational instructions
- Added gitignore filtering to glob and grep tools
- Created pyproject.toml for each subproject

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

webber-api/wakeup.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+# Webber Server Startup Script
+
+set -e
+
+# Colors for output
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m' # No Color
+
+echo -e "${GREEN}Starting Webber...${NC}"
+
+# Development port (8095) - Production uses 8086 in Docker
+DEV_PORT=8095
+
+# Check if dev port is already in use
+if lsof -Pi :$DEV_PORT -sTCP:LISTEN -t >/dev/null 2>&1 ; then
+    echo -e "${RED}Error: Port $DEV_PORT is already in use${NC}"
+    echo "Run: lsof -i :$DEV_PORT to see what's using it"
+    echo "Or run: kill \$(lsof -t -i:$DEV_PORT) to stop it"
+    exit 1
+fi
+
+# Activate virtual environment if not already activated
+if [ -z "$VIRTUAL_ENV" ]; then
+    if [ -d ".venv" ]; then
+        echo -e "${YELLOW}Activating virtual environment...${NC}"
+        source .venv/bin/activate
+    else
+        echo -e "${RED}Error: Virtual environment not found${NC}"
+        echo "Run: python -m venv .venv && source .venv/bin/activate && pip install -r requirements-dev.txt"
+        exit 1
+    fi
+fi
+
+# Create logs directory if it doesn't exist
+LOGS_DIR="logs"
+mkdir -p "$LOGS_DIR"
+
+# Clear/create log file
+LOG_FILE="$LOGS_DIR/server.log"
+> "$LOG_FILE"
+echo -e "${YELLOW}Logs will be written to: ${LOG_FILE}${NC}"
+
+# Start the server
+echo -e "${GREEN}Starting uvicorn server on http://localhost:$DEV_PORT${NC}"
+echo -e "${YELLOW}Production is on :8086, dev is on :$DEV_PORT${NC}"
+echo -e "${YELLOW}Press Ctrl+C to stop the server${NC}"
+echo ""
+
+uvicorn src.main:app --reload --host 0.0.0.0 --port $DEV_PORT 2>&1 | tee "$LOG_FILE"