Add comprehensive offline help system with fuzzy search

🎯 Enhanced Features:
- Integrated navi, cheat, tldr, and fzf for interactive help
- Custom cheat sheets for PDF analysis, malware analysis, and system utilities
- find-tool command for fuzzy searching through all REMnux tools
- Comprehensive help command with workflows and examples
- Complete offline documentation system

📚 Help System Components:
- help                    - Main help system
- help tools [term]       - Search for tools (fuzzy matching)
- help cheat <tool>       - Show command examples
- help examples           - Browse examples interactively (navi + fzf)
- help pdf/malware/forensics - Analysis workflows
- help --offline          - Verify offline capabilities

🛠️ Tools Added:
- navi: Interactive cheat sheet browser
- cheat: Command-line cheat sheets
- tldr: Quick command examples
- fzf: Fuzzy finder (already included)

All documentation works completely offline with local REMnux docs database
and custom cheat sheets for analysis workflows.

scripts/download-docs.sh

@@ -0,0 +1,118 @@
+#!/bin/bash
+
+# Download and process REMnux documentation for offline use
+# This script creates a searchable database of all tools and their usage
+
+set -e
+
+DOCS_DIR="/opt/remnux-docs"
+TOOLS_DB="/opt/remnux-docs/tools.db"
+
+echo "📚 Downloading REMnux Documentation..."
+
+# Create documentation directory
+mkdir -p "$DOCS_DIR"
+
+# Download key documentation files from REMnux docs
+BASE_URL="https://docs.remnux.org"
+
+# Categories of tools to download
+CATEGORIES=(
+    "analyze+documents/pdf"
+    "analyze+documents/general" 
+    "analyze+documents/microsoft+office"
+    "analyze+documents/email+messages"
+    "examine+static+properties/general"
+    "statically+analyze+code/general"
+    "statically+analyze+code/scripts"
+    "dynamically+reverse-engineer+code/general"
+    "gather+and+analyze+data"
+    "view+or+edit+files"
+    "general+utilities"
+)
+
+# Function to download and process a documentation page
+download_category() {
+    local category="$1"
+    local filename=$(echo "$category" | sed 's/+/_/g' | sed 's/\//_/g')
+    
+    echo "Downloading: $category"
+    if curl -s "$BASE_URL/discover-the-tools/$category.md" -o "$DOCS_DIR/${filename}.md"; then
+        echo "✓ Downloaded $filename.md"
+    else
+        echo "⚠ Failed to download $category"
+    fi
+}
+
+# Download all categories
+for category in "${CATEGORIES[@]}"; do
+    download_category "$category"
+done
+
+# Create a consolidated tools database
+echo "🔍 Creating searchable tools database..."
+
+# Function to extract tool information from markdown files
+create_tools_db() {
+    echo "# REMnux Tools Database" > "$TOOLS_DB"
+    echo "# Format: TOOL_NAME|DESCRIPTION|CATEGORY|USAGE_HINTS" >> "$TOOLS_DB"
+    echo "" >> "$TOOLS_DB"
+    
+    for md_file in "$DOCS_DIR"/*.md; do
+        if [[ -f "$md_file" ]]; then
+            local category=$(basename "$md_file" .md | sed 's/_/ /g')
+            
+            # Extract tool entries (they start with ##)
+            awk -v cat="$category" '
+                /^## / { 
+                    if (tool_name != "") {
+                        print tool_name "|" description "|" cat "|" usage
+                    }
+                    tool_name = substr($0, 4)  # Remove "## "
+                    description = ""
+                    usage = ""
+                    in_tool = 1
+                    next
+                }
+                /^#/ && !/^## / { in_tool = 0; next }
+                in_tool && /^[A-Z]/ && description == "" { 
+                    description = $0 
+                    next
+                }
+                in_tool && /^\*\*Website/ { 
+                    usage = usage $0 " "
+                    next
+                }
+                in_tool && /^\*\*Notes/ { 
+                    usage = usage $0 " "
+                    next
+                }
+                END {
+                    if (tool_name != "") {
+                        print tool_name "|" description "|" cat "|" usage
+                    }
+                }
+            ' "$md_file" >> "$TOOLS_DB"
+        fi
+    done
+}
+
+create_tools_db
+
+# Add our custom tools to the database
+echo "" >> "$TOOLS_DB"
+echo "# Additional Tools Added to Container" >> "$TOOLS_DB"
+echo "capa|Malware capability detection tool from Mandiant|malware analysis|Analyze executable files to identify capabilities" >> "$TOOLS_DB"
+echo "box-js|JavaScript sandbox for malware analysis|malware analysis|box-js sample.js to analyze JavaScript in sandbox" >> "$TOOLS_DB"
+echo "visidata|Interactive data exploration tool|data analysis|vd filename.csv to explore data interactively" >> "$TOOLS_DB"
+echo "unfurl_cli.py|URL analysis and extraction tool|data analysis|unfurl_cli.py URL to analyze and extract components" >> "$TOOLS_DB"
+
+echo "✅ Documentation download complete!"
+echo "📊 Tools database created at: $TOOLS_DB"
+
+# Count tools
+TOOL_COUNT=$(grep -c "^[^#]" "$TOOLS_DB" | head -1)
+echo "🔧 Indexed $TOOL_COUNT tools"
+
+echo ""
+echo "Usage: Use 'find-tool' command to search through all available tools"