Feature: Update command for each tool (option 3 in tool menu)

HackingTool:
- Add update() method — detects install method from INSTALL_COMMANDS
  and runs the appropriate update:
  git clone → git -C <dir> pull
  pip install → pip install --upgrade
  go install → re-runs go install (fetches latest)
  gem install → gem update
- Checks is_installed first; shows warning if not installed
- Added as option 3 in every tool's OPTIONS menu (Install, Run, Update)

core.py

@@ -109,6 +109,7 @@ class HackingTool:
             self.OPTIONS.append(("Install", self.install))
         if runnable:
             self.OPTIONS.append(("Run", self.run))
+        self.OPTIONS.append(("Update", self.update))
         self.OPTIONS.extend(options)
 
     @property
@@ -227,6 +228,46 @@ class HackingTool:
 
     def after_uninstall(self): pass
 
+    def update(self):
+        """Smart update — detects install method and runs the right update command."""
+        if not self.is_installed:
+            console.print("[warning]Tool is not installed yet. Install it first.[/warning]")
+            return
+
+        updated = False
+        for ic in (self.INSTALL_COMMANDS or []):
+            if "git clone" in ic:
+                # Extract repo dir name from clone command
+                parts = ic.split()
+                repo_urls = [p for p in parts if p.startswith("http")]
+                if repo_urls:
+                    dirname = repo_urls[0].rstrip("/").rsplit("/", 1)[-1].replace(".git", "")
+                    if os.path.isdir(dirname):
+                        console.print(f"[cyan]→ git -C {dirname} pull[/cyan]")
+                        os.system(f"git -C {dirname} pull")
+                        updated = True
+            elif "pip install" in ic:
+                # Re-run pip install (--upgrade)
+                upgrade_cmd = ic.replace("pip install", "pip install --upgrade")
+                console.print(f"[cyan]→ {upgrade_cmd}[/cyan]")
+                os.system(upgrade_cmd)
+                updated = True
+            elif "go install" in ic:
+                # Re-run go install (fetches latest)
+                console.print(f"[cyan]→ {ic}[/cyan]")
+                os.system(ic)
+                updated = True
+            elif "gem install" in ic:
+                upgrade_cmd = ic.replace("gem install", "gem update")
+                console.print(f"[cyan]→ {upgrade_cmd}[/cyan]")
+                os.system(upgrade_cmd)
+                updated = True
+
+        if updated:
+            console.print("[success]✔ Update complete![/success]")
+        else:
+            console.print("[dim]No automatic update method available for this tool.[/dim]")
+
     def before_run(self): pass
 
     def run(self):