Add IP geolocation and subdomain enumeration plugins

- Added geo.py plugin for IP geolocation with ip-api.com and ipapi.co support
- Added subdomains.py plugin for subdomain enumeration using CertSpotter API
- Updated help.py with documentation for new plugins
- Updated README.md with documentation for new plugins
- Both plugins support domain/IP resolution and provide detailed information

README.md

@@ -240,7 +240,59 @@ Perform comprehensive WHOIS lookups for domains and IP addresses.
 - Provides clear error messages for failed lookups
 - Handles rate limiting and WHOIS server unavailability
 
-## ExploitDB Plugin
+### 🔍 Subdomain Enumeration
+
+**🔍 !subdomains [domain]**
+Enumerate subdomains using SSL certificate transparency logs with the CertSpotter API.
+
+**Features:**
+- Discovers subdomains through SSL certificate transparency logs
+- Uses the free CertSpotter API for enumeration
+- No rate limiting or API key required
+- Identifies subdomains through certificate SAN (Subject Alternative Name) enumeration
+- No configuration required
+
+**Examples:**
+```bash
+!subdomains example.com
+!subdomains google.com
+!subdomains github.com
+```
+
+**Output includes:**
+- List of discovered subdomains from certificate transparency logs
+- Formatted list with up to 20 subdomains shown
+- Total count of discovered subdomains
+
+### 🌐 IP Geolocation
+
+**📍 !geo [ip/domain]**
+Perform IP geolocation lookups with detailed geographic information.
+
+**Features:**
+- Uses ip-api.com as primary geolocation service with ipapi.co fallback
+- Automatic domain to IP resolution
+- Comprehensive geographic information
+- No API key required for basic usage
+
+**Examples:**
+```bash
+!geo 8.8.8.8
+!geo example.com
+!geo google.com
+```
+
+**Information provided:**
+- Country and country code
+- Region/State
+- City
+- Postal code
+- Latitude/Longitude coordinates
+- Timezone
+- ISP/Organization
+- Autonomous System Number (ASN)
+
+### ExploitDB Plugin
 
 A security plugin that searches Exploit-DB for vulnerabilities and exploits directly from Matrix.