chore: update syntax and test doc

Author: sigoden

jsona.configuration.json

@@ -14,5 +14,9 @@
 		{ "open": "'", "close": "'", "notIn": ["string"] },
 		{ "open": "\"", "close": "\"", "notIn": ["string", "comment"] },
 		{ "open": "`", "close": "`", "notIn": ["string", "comment"] }
-	]
+	],
+	"indentationRules": {
+		"increaseIndentPattern": "({+(?=((\\\\.|[^\"\\\\])*\"(\\\\.|[^\"\\\\])*\")*[^\"}]*)$)|(\\[+(?=((\\\\.|[^\"\\\\])*\"(\\\\.|[^\"\\\\])*\")*[^\"\\]]*)$)",
+		"decreaseIndentPattern": "^\\s*[}\\]],?\\s*$"
+	}
 }

test/repository-syntax.jsona

@@ -12,9 +12,12 @@
     @number(-3)
     @string('abc "def" ghi')
     @array([3,4])
-    @object({k: "v"})
+    @object({
+        k1: "v1",
+        k2: "v2",
+    })
 
-    nullValue: null,
+    nullValue: /* xyz */ null,
     boolTrue: true,
     boolFale: false,
     float: 3.14,