refactor: Migrate skill tests to Org files - delete redundant .lisp

Added inline tests:
- org-skill-lisp-utils.org: lisp-validator tests
- org-skill-tool-permissions.org: tool-permissions tests

Deleted duplicates:
- tests/lisp-validator-tests.lisp
- tests/tool-permissions-tests.lisp

All tests pass: 84/84 (100%)

tests/tool-permissions-tests.lisp

@@ -1,40 +0,0 @@
-(defpackage :opencortex-tool-permissions-tests
-  (:use :cl :fiveam :opencortex)
-  (:export #:tool-permissions-suite))
-
-(in-package :opencortex-tool-permissions-tests)
-
-(def-suite tool-permissions-suite
-  :description "Tests for Tool Permission Tiers.")
-
-(in-suite tool-permissions-suite)
-
-(test default-permission-is-allow
-  "Unknown tools default to :allow."
-  (is (eq (get-tool-permission :unknown-tool-xyz) :allow)))
-
-(test set-and-get-permission
-  "Verify :allow, :deny, :ask persist correctly."
-  (set-tool-permission :test-tool-abc :deny)
-  (is (eq (get-tool-permission :test-tool-abc) :deny))
-  (set-tool-permission :test-tool-abc :ask)
-  (is (eq (get-tool-permission :test-tool-abc) :ask))
-  (set-tool-permission :test-tool-abc :allow)
-  (is (eq (get-tool-permission :test-tool-abc) :allow)))
-
-(test permission-gate-allow
-  ":allow returns :allow."
-  (set-tool-permission :gate-allow-tool :allow)
-  (is (eq (check-tool-permission-gate :gate-allow-tool nil) :allow)))
-
-(test permission-gate-deny
-  ":deny returns :deny."
-  (set-tool-permission :gate-deny-tool :deny)
-  (is (eq (check-tool-permission-gate :gate-deny-tool nil) :deny)))
-
-(test permission-gate-ask
-  ":ask returns a signal list."
-  (set-tool-permission :gate-ask-tool :ask)
-  (let ((result (check-tool-permission-gate :gate-ask-tool nil)))
-    (is (listp result))
-    (is (eq (car result) :ask))))