tests: standardize on embedded tests (migrate all from tests/ to lisp/ sources)

org/programming-lisp.org

@@ -17,6 +17,11 @@ The skill has four layers:
 
 * Implementation
 
+** Package Context
+#+begin_src lisp
+(in-package :passepartout)
+#+end_src
+
 ** Structural Validation
 ;; REPL-VERIFIED: 2026-05-03T13:00:00
 #+begin_src lisp
@@ -215,7 +220,7 @@ The skill has four layers:
 
 * Test Suite
 Tests for the Lisp Validator structural, syntactic, and semantic gates.
-#+begin_src lisp :tangle ../tests/programming-lisp-tests.lisp
+#+begin_src lisp
 (defpackage :passepartout-utils-lisp-tests
   (:use :cl :fiveam :passepartout)
   (:export #:utils-lisp-suite))