fix(warnings): update import.meta warning messages for clarity (#19961)

lib/dependencies/ImportMetaPlugin.js

@@ -115,7 +115,7 @@ class ImportMetaPlugin {
 									new ModuleDependencyWarning(
 										parser.state.module,
 										new CriticalDependencyWarning(
-											"Accessing import.meta directly is unsupported (only property access or destructuring is supported)"
+											"'import.meta' cannot be used as a standalone expression. For static analysis, its properties must be accessed directly (e.g., 'import.meta.url') or through destructuring."
 										),
 										/** @type {DependencyLocation} */ (metaProperty.loc)
 									)

test/cases/parsing/asi/warnings.js

@@ -1,3 +1,7 @@
 "use strict";
 
-module.exports = [[/Critical dependency: Accessing import\.meta/]];
+module.exports = [
+	[
+		/Critical dependency: 'import\.meta' cannot be used as a standalone expression\. For static analysis, its properties must be accessed directly \(e\.g\., 'import\.meta\.url'\) or through destructuring\./
+	]
+];

test/cases/parsing/import-meta/warnings.js

@@ -2,6 +2,6 @@
 
 module.exports = [
 	[
-		/Accessing import.meta directly is unsupported \(only property access or destructuring is supported\)/
+		/'import\.meta' cannot be used as a standalone expression\. For static analysis, its properties must be accessed directly \(e\.g\., 'import\.meta\.url'\) or through destructuring\./
 	]
 ];