Full customization of appearance, behavior, system tray and input source indicator for IBus

Support Customization of:
* Candidate Box Orientation
* Candidate Box Animation
* Right-click Candidate Box to Switch the Input Mode or Open the Tray Menu
* Scroll on Candidate Box to Switch among Pages or Candidates
* Fix Candidate Box to Not Follow the Caret and Set Fixed Position
* Candidate Box Font
* Input Mode Remember and Auto-switch by APP
* Fix IME List Order
* Drag Candidate Box to Reposition
* Show or Hide Candidate Box Page Buttons
* System Tray Menus and Interaction Settings
* * Show or Hide Tray Icon
* * Directly Click Tray Icon to Switch Input Mode
* * Add Additional Menu
* Input Source Indicator Appearance and Interaction Settings
* * Enable Indicator
* * Only Indicate when Switching Input Mode
* * Only Indicate when Using ASCII Input Mode
* * Right-click Indicator to Hide
* * Scroll on Indicator to Switch Input Mode
* * Indicator Animation
* * Customize Font
* * Left-click Indicator to Drag to Move Indicator or Switch Input Mode
* * Enable Auto-hide Indicator and Configure Auto-hide Timeout
* Theme (Stylesheet Provided or Extracted from GNOME Shell Themes, Refer to Help Instructions in Extension for More)
* Candidate Box Background and its Displaying Style
* Theme and Background Picture Follow GNOME Night Light Mode

User Guide: https://translate.google.com/translate?sl=zh-CN&tl=en&u=https://github.com/openSUSE/Customize-IBus/blob/main/GUIDE_CN.md

深度定制 IBus 的外观、行为、系统托盘以及输入指示

支持自定义：
* 候选框方向
* 候选框动画
* 右键单击候选框以切换输入源或打开任务栏菜单
* 候选框上滚动以切换页面或候选词
* 固定候选框使其不跟随光标以及设定固定位置
* 候选框字体
* 输入模式根据应用记忆并自动切换
* 固定输入法列表顺序
* 拖拽移动候选框
* 显示或隐藏候选框调页按钮
* 系统任务栏托盘显示和交互设置
* * 显示或隐藏托盘图标
* * 直接点击托盘图标切换输入源
* * 添加额外菜单
* 输入源指示器及其显示和交互设置
* * 启用指示器
* * 仅在切换输入法时指示
* * 仅在英文输入时指示
* * 右击指示器来将其隐藏
* * 指示器上滚动来切换输入源
* * 指示器显示动画
* * 自定义字体
* * 左击指示器以拖拽移动或者切换输入源
* * 启用自动隐藏以及配置自动隐藏时延
* 皮肤样式主题（提供的或者从GNOME Shell主题中提取的样式表，参见扩展的帮助部分来获取更多指导）
* 候选框背景图片及其显示样式
* 主题和背景图片跟随GNOME夜灯

使用指南：https://blog.csdn.net/qq_18572023/article/details/116331601