More refactoring of tests and packages

Squashed commit of the following:

commit c4659d8be4d664ba7fd4b59d613536f2368cff0e
Author: riton <riton@riton.home>
Date:   Mon Jul 14 21:44:48 2025 +0300

    fix package name typo

commit ec802339b838d059f4bc9e4da7cc370ab4d91a46
Author: riton <riton@riton.home>
Date:   Mon Jul 14 21:43:42 2025 +0300

    seperate deftest from test instances

commit 92d20e0b8405a4a51f01ff65f8bd81f4d25c1e21
Author: riton <riton@riton.home>
Date:   Mon Jul 14 21:29:47 2025 +0300

    make a test system definition

commit 125e5fe1e8c07230f32e762273c5c0dd259209e6
Author: riton <riton@riton.home>
Date:   Mon Jul 14 00:39:09 2025 +0300

    compiler macro of as-token

commit 0e39c32097783aa39e3fed479bb85b412065f597
Author: riton <riton@riton.home>
Date:   Mon Jul 14 00:21:46 2025 +0300

    define new packages

1 files changed, 30 insertions, 2 deletions

diff --git a/src/package.lisp b/src/package.lisp
index aa399d9..6f05abe 100644
--- a/src/package.lisp
+++ b/src/package.lisp
@@ -1,2 +1,30 @@
-(defpackage :monkey
-  (:use :common-lisp))
+(defpackage #:utilities
+  (:use #:common-lisp)
+  (:export #:eval-always
+           #:make-string-view
+           #:read-file-contents))
+
+(defpackage #:monkey
+  (:use #:common-lisp #:utilities))
+
+(defpackage #:token
+  (:use #:common-lisp #:utilities)
+  (:shadow #:type)
+  (:export #:token
+           #:type-is
+           #:token=
+           #:make
+           #:as-token
+           #:lookup-identifier
+           ;; the following depend on macro arguments
+           #:token-type
+           ;;#:string->token
+           ;;#:token->string
+           ))
+
+(defpackage #:lexer
+  (:use #:common-lisp #:utilities)
+  (:export #:make #:lex))
+
+(defpackage #:monkey/test
+  (:use #:common-lisp #:utilities))