feat: v0.2.1 — reference links, context menu, RTL, ja/ko, regex search, hooks, copy API

## Added
- Reference link/image resolution: [text][ref] + ![alt][ref] with [ref]: url definitions
- Right-click context menu: undo/redo/cut/copy/paste/selectAll + custom items
- RTL CSS layout support for Arabic, Hebrew, Persian etc.
- Japanese (ja) and Korean (ko) locales with 60+ keys each
- Divider position localStorage persistence
- Regex search toggle in search/replace panel
- Export HTML with embedded CSS styles
- beforeChange / afterChange lifecycle hooks (instance + global)
- copyAsMarkdown() / copyAsHTML() clipboard APIs
- CHANGELOG.md, CONTRIBUTING.md, CI workflow (.github/workflows/ci.yml)
- 2 new test suites: index.test.ts, styles.test.ts (684 total tests, +74)

## Changed
- autoSave plugin: closure-based state per instance instead of this context
- Plugin install() now receives options as second argument
- RTL locale detection: now uses language prefix (ar-SA → RTL)
- Rollup dev mode: only builds UMD format
- prepublishOnly now includes typecheck + test
- Version bumped to 0.2.1

## Fixed
- [text][ref] now correctly renders as link (was raw text)
- ![alt][ref] no longer produces empty src
- autoSave plugin state isolation across multiple editor instances
- Footnote definitions no longer consumed by refDef handler

rollup.config.js

@@ -55,61 +55,64 @@ export default [
     },
     plugins: [...basePlugins, ...devPlugins],
   },
-  // ES Module
-  {
-    input: 'src/index.ts',
-    output: {
-      file: 'dist/metona-editor.esm.js',
-      format: 'es',
-      exports: 'named',
-      sourcemap: true,
+  // Only build all formats in production
+  ...(isDev ? [] : [
+    // ES Module
+    {
+      input: 'src/index.ts',
+      output: {
+        file: 'dist/metona-editor.esm.js',
+        format: 'es',
+        exports: 'named',
+        sourcemap: true,
+      },
+      plugins: basePlugins,
     },
-    plugins: basePlugins,
-  },
-  // CommonJS
-  {
-    input: 'src/index.ts',
-    output: {
-      file: 'dist/metona-editor.cjs.js',
-      format: 'cjs',
-      exports: 'named',
-      sourcemap: true,
+    // CommonJS
+    {
+      input: 'src/index.ts',
+      output: {
+        file: 'dist/metona-editor.cjs.js',
+        format: 'cjs',
+        exports: 'named',
+        sourcemap: true,
+      },
+      plugins: basePlugins,
     },
-    plugins: basePlugins,
-  },
-  // UMD minified
-  {
-    input: 'src/index.ts',
-    output: {
-      file: 'dist/metona-editor.min.js',
-      format: 'umd',
-      name: 'MeEditor',
-      exports: 'named',
-      sourcemap: false,
+    // UMD minified
+    {
+      input: 'src/index.ts',
+      output: {
+        file: 'dist/metona-editor.min.js',
+        format: 'umd',
+        name: 'MeEditor',
+        exports: 'named',
+        sourcemap: false,
+      },
+      plugins: [
+        ...basePlugins,
+        terser({
+          compress: {
+            drop_console: true,
+            drop_debugger: true,
+            pure_funcs: ['console.log', 'console.warn'],
+            passes: 2,
+          },
+          format: { comments: false },
+          mangle: { toplevel: true },
+        }),
+      ],
     },
-    plugins: [
-      ...basePlugins,
-      terser({
-        compress: {
-          drop_console: true,
-          drop_debugger: true,
-          pure_funcs: ['console.log', 'console.warn'],
-          passes: 2,
-        },
-        format: { comments: false },
-        mangle: { toplevel: true },
-      }),
-    ],
-  },
-  // TypeScript declarations bundle
-  {
-    input: 'src/index.ts',
-    output: {
-      file: 'dist/metona-editor.d.ts',
-      format: 'es',
+    // TypeScript declarations bundle
+    {
+      input: 'src/index.ts',
+      output: {
+        file: 'dist/metona-editor.d.ts',
+        format: 'es',
+      },
+      plugins: [
+        dts(),
+      ],
     },
-    plugins: [
-      dts(),
-    ],
-  },
+  ]),
 ];