Point v0.2.0

What's Changed

• fix: 「从这里分支」改问分支问题时保持 2/2 平级（siblingOf） by @Sqhh99 in #46
• test(fork-sibling): 改问 siblingOf 补充测试 by @Sqhh99 in #47
• docs: README 换成 v0.1.1 真实界面截图 by @Sqhh99 in #49
• fix: 「⑂ n 个分支」只数不同文字段（groupBySpan） by @Sqhh99 in #48
• docs: README 截图说明改为实际界面 by @Sqhh99 in #50
• test(tasks): tasks:run 参数类型校验补充测试 by @Sqhh99 in #51
• test(e2e): docx/xlsx 阅读与模型设置 by @Sqhh99 in #52
• feat(viewers): PDF/Word/Excel 原貌查看器 + 共用阅读顶栏 by @Sqhh99 in #53
• fix(viewers): PDF 字体空白、旧标记定位、滚动复位、适应宽度、Word 颜色 by @Sqhh99 in #54
• feat(multi-model): ModelSpec、思考等级、对话记忆模型、状态栏即时刷新 by @Sqhh99 in #55
• fix(multi-model): settings:changed、tasks:run 带模型、model-notice by @Sqhh99 in #56
• chore: bump version to 0.2.0 by @Sqhh99 in #57
• fix(test): Windows 加密 PDF 拒绝用例超时放宽至 30s by @Sqhh99 in #58

Full Changelog: v0.1.1...v0.2.0