feat: refactor token output

Author: gengjiawen

lexer/snapshots/lexer__tests__lexer_array.snap

@@ -4,33 +4,33 @@ expression: token_vs
 ---
 [
     Token {
+        kind: LBRACKET,
         span: Span {
             start: 0,
             end: 1,
         },
-        kind: LBRACKET,
     },
     Token {
+        kind: INT(
+            3,
+        ),
         span: Span {
             start: 1,
             end: 2,
         },
-        kind: INT(
-            3,
-        ),
     },
     Token {
+        kind: RBRACKET,
         span: Span {
             start: 2,
             end: 3,
         },
-        kind: RBRACKET,
     },
     Token {
+        kind: EOF,
         span: Span {
             start: 3,
             end: 4,
         },
-        kind: EOF,
     },
 ]

lexer/snapshots/lexer__tests__lexer_bool.snap

@@ -4,40 +4,40 @@ expression: token_vs
 ---
 [
     Token {
+        kind: LET,
         span: Span {
             start: 0,
             end: 3,
         },
-        kind: LET,
     },
     Token {
+        kind: IDENTIFIER {
+            name: "y",
+        },
         span: Span {
             start: 4,
             end: 5,
         },
-        kind: IDENTIFIER {
-            name: "y",
-        },
     },
     Token {
+        kind: ASSIGN,
         span: Span {
             start: 5,
             end: 6,
         },
-        kind: ASSIGN,
     },
     Token {
+        kind: TRUE,
         span: Span {
             start: 6,
             end: 10,
         },
-        kind: TRUE,
     },
     Token {
+        kind: EOF,
         span: Span {
             start: 10,
             end: 11,
         },
-        kind: EOF,
     },
 ]