feat(purge): add --paths option to configure scan directories

- Add lib/manage/purge_paths.sh for interactive path management
- Shows current paths status and opens editor for customization
- Update bin/purge.sh to handle --paths option
- Update README with new command

lib/manage/purge_paths.sh

@@ -0,0 +1,114 @@
+#!/bin/bash
+# Purge paths management functionality
+# Opens config file for editing and shows current status
+
+set -euo pipefail
+
+# Get script directory and source dependencies
+_MOLE_MANAGE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$_MOLE_MANAGE_DIR/../core/common.sh"
+source "$_MOLE_MANAGE_DIR/../clean/project.sh"
+
+# Config file path
+readonly PURGE_PATHS_CONFIG="$HOME/.config/mole/purge_paths"
+
+# Ensure config file exists with helpful template
+ensure_config_template() {
+    if [[ ! -f "$PURGE_PATHS_CONFIG" ]]; then
+        ensure_user_dir "$(dirname "$PURGE_PATHS_CONFIG")"
+        cat > "$PURGE_PATHS_CONFIG" << 'EOF'
+# Mole Purge Paths - Directories to scan for project artifacts
+# Add one path per line (supports ~ for home directory)
+# Delete all paths or this file to use defaults
+#
+# Example:
+# ~/Documents/MyProjects
+# ~/Work/ClientA
+# ~/Work/ClientB
+EOF
+    fi
+}
+
+# Main management function
+manage_purge_paths() {
+    ensure_config_template
+
+    local display_config="${PURGE_PATHS_CONFIG/#$HOME/~}"
+
+    # Clear screen
+    if [[ -t 1 ]]; then
+        printf '\033[2J\033[H'
+    fi
+
+    echo -e "${PURPLE_BOLD}Purge Paths Configuration${NC}"
+    echo ""
+
+    # Show current status
+    echo -e "${YELLOW}Current Scan Paths:${NC}"
+
+    # Reload config
+    load_purge_config
+
+    if [[ ${#PURGE_SEARCH_PATHS[@]} -gt 0 ]]; then
+        for path in "${PURGE_SEARCH_PATHS[@]}"; do
+            local display_path="${path/#$HOME/~}"
+            if [[ -d "$path" ]]; then
+                echo -e "  ${GREEN}✓${NC} $display_path"
+            else
+                echo -e "  ${GRAY}○${NC} $display_path ${GRAY}(not found)${NC}"
+            fi
+        done
+    fi
+
+    # Check if using custom config
+    local custom_count=0
+    if [[ -f "$PURGE_PATHS_CONFIG" ]]; then
+        while IFS= read -r line; do
+            line="${line#"${line%%[![:space:]]*}"}"
+            line="${line%"${line##*[![:space:]]}"}"
+            [[ -z "$line" || "$line" =~ ^# ]] && continue
+            ((custom_count++))
+        done < "$PURGE_PATHS_CONFIG"
+    fi
+
+    echo ""
+    if [[ $custom_count -gt 0 ]]; then
+        echo -e "${GRAY}Using custom config with $custom_count path(s)${NC}"
+    else
+        echo -e "${GRAY}Using ${#DEFAULT_PURGE_SEARCH_PATHS[@]} default paths${NC}"
+    fi
+
+    echo ""
+    echo -e "${YELLOW}Default Paths:${NC}"
+    for path in "${DEFAULT_PURGE_SEARCH_PATHS[@]}"; do
+        echo -e "  ${GRAY}-${NC} ${path/#$HOME/~}"
+    done
+
+    echo ""
+    echo -e "${YELLOW}Config File:${NC} $display_config"
+    echo ""
+
+    # Open in editor
+    local editor="${EDITOR:-${VISUAL:-nano}}"
+    echo -e "Opening in ${CYAN}$editor${NC}..."
+    echo -e "${GRAY}Save and exit to apply changes. Leave empty to use defaults.${NC}"
+    echo ""
+
+    # Wait for user to read
+    sleep 1
+
+    # Open editor
+    "$editor" "$PURGE_PATHS_CONFIG"
+
+    # Reload and show updated status
+    load_purge_config
+
+    echo ""
+    echo -e "${GREEN}${ICON_SUCCESS}${NC} Configuration updated"
+    echo -e "${GRAY}Run 'mo purge' to clean with new paths${NC}"
+    echo ""
+}
+
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    manage_purge_paths
+fi