chore(code): add smart tab behaviour

packages/codemirror/src/extensions/eslint.ts

@@ -0,0 +1,46 @@
+import type { Linter } from "eslint-linter-browserify";
+
+export async function lint(mimeType: string) {
+
+    const Linter = (await import("eslint-linter-browserify")).Linter;
+    const js = (await import("@eslint/js"));
+    const globalDefinitions = (await import("globals"));
+
+    let globals: Record<string, any> = {
+        ...globalDefinitions.browser,
+        api: "readonly",
+        module: "readonly"
+    };
+
+    // Unsupported languages
+    if (mimeType.startsWith("text/typescript")) {
+        return [];
+    }
+
+    // Custom globals
+    if (mimeType === "application/javascript;env=frontend") {
+        globals = { ...globals, ...globalDefinitions.jquery };
+    } else if (mimeType === "application/javascript;env=backend") {
+
+    }
+
+    const config: (Linter.LegacyConfig | Linter.Config | Linter.Config[]) = [
+        js.configs.recommended,
+        {
+            languageOptions: {
+                parserOptions: {
+                    ecmaVersion: 2024
+                },
+                globals
+            },
+            rules: {
+                "no-unused-vars": [ "warn", { vars: "local", args: "after-used" }]
+            }
+        }
+    ];
+
+    return {
+        linter: new Linter(),
+        config
+    }
+}