build: embed test scripts into org files and purge tests directory

- Embedded run-all-tests.lisp into harness/package.org.
- Deleted the tests/ directory and orphaned Python test scripts, as all other test files are correctly tangled from their parent org files.

tests/pipeline-act-tests.lisp

@@ -1,33 +0,0 @@
-(defpackage :opencortex-pipeline-act-tests
-  (:use :cl :fiveam :opencortex)
-  (:export #:pipeline-act-suite))
-
-(in-package :opencortex-pipeline-act-tests)
-
-(def-suite pipeline-act-suite
-  :description "Test suite for Act pipeline")
-
-(in-suite pipeline-act-suite)
-
-(test test-act-gate-symbolic-guard-bypass
-  "Verify that act-gate proceeds normally when no skill intercepts."
-  (clrhash opencortex::*skills-registry*)
-  (let* ((signal (list :type :EVENT :status nil :depth 0 :approved-action '(:target :cli :payload (:text "Hello"))))
-         (result (opencortex:act-gate signal)))
-    (is (eq :acted (getf signal :status)))
-    (is (null result))))
-
-(test test-act-gate-symbolic-guard-interception
-  "Verify that act-gate intercepts actions when a skill returns a LOG/EVENT."
-  (clrhash opencortex::*skills-registry*)
-  (opencortex::defskill :mock-bouncer
-    :priority 200
-    :trigger (lambda (ctx) t)
-    :deterministic (lambda (action ctx)
-                     (list :type :LOG :payload (:text "BLOCKED BY SYMBOLIC GUARD"))))
-  (let* ((signal (list :type :EVENT :status nil :depth 0 :approved-action '(:target :shell :payload (:cmd "ls"))))
-         (result (opencortex:act-gate signal)))
-    (is (eq :acted (getf signal :status)))
-    (is (not (null result)))
-    (is (eq :LOG (getf result :type)))
-    (is (search "BLOCKED BY SYMBOLIC GUARD" (getf (getf result :payload) :text))))))