fix(core): use [warning] markup in uninstall() to match install() style

Uninstall commands were printed in red ([error]) which falsely implied
a failure. Changed to [warning] (yellow) to be consistent with how
install() displays commands — informational, not alarming.

Fixes #662

core.py

@@ -225,7 +225,7 @@ class HackingTool:
         if self.before_uninstall():
             if isinstance(self.UNINSTALL_COMMANDS, (list, tuple)):
                 for cmd in self.UNINSTALL_COMMANDS:
-                    console.print(f"[error]→ {cmd}[/error]")
+                    console.print(f"[warning]→ {cmd}[/warning]")
                     os.system(cmd)
         self.after_uninstall()