release: v0.1.1 — bug fixes, CSS scoping, parser improvements

Bug Fixes:
- fix(core): insert() replace param was non-functional due to identical ternary branches
- fix(types): correct project URL typo (MetonaToast → MetonaEditor)

Improvements:
- feat(core): scope CSS theme variables to .me-wrapper per-instance, preventing global style pollution
- feat(themes): add optional target parameter to setThemeVariables() for element-scoped theming
- perf(parser): improve bold/strikethrough regex to support inline delimiter chars (e.g. **a*b**, ~~a~b~~)
- fix(parser): prevent *** cross-tag nesting by requiring first content char ≠ delimiter
- docs(animations): clarify module purpose as future-use animation metadata registry

Tests:
- test(core): add 2 cases for insert() replace:true / replace:false behavior
- All 409 tests passing (+2 new)

Chores:
- bump version 0.1.0 → 0.1.1 across all source files, package.json, README, and demo

src/themes.js

@@ -1,7 +1,7 @@
 /**
  * MetonaEditor Themes - 主题管理
  * @module themes
- * @version 0.1.0
+ * @version 0.1.1
  * @description 主题系统、自定义主题和主题切换
  */
 
@@ -70,11 +70,13 @@ export const applyTheme = (theme) => {
 
 /**
  * 设置主题CSS变量
+ * @param {Object} config - 主题配置对象
+ * @param {HTMLElement} [target] - 目标元素，不传则设置到 documentElement（全局默认）
  */
-export const setThemeVariables = (config) => {
+export const setThemeVariables = (config, target) => {
   if (typeof document === 'undefined' || !config || typeof config !== 'object') return;
 
-  const root = document.documentElement;
+  const root = target || document.documentElement;
   // 基础变量（保留用于全局与组件回退）
   root.style.setProperty('--md-bg', config.bg);
   root.style.setProperty('--md-text', config.text);