chore: remove deprecated theme and thumbnail modules

1. Removed cursor-helper DBus service and related files
2. Removed theme_thumb module for generating theme previews
3. Removed themes module for theme management and scanning
4. Removed thumbnails module for file thumbnail generation
5. Removed thumbnailer binary
6. Updated Makefile to exclude removed components from build
7. These modules have been migrated to other repositories or are no
longer needed

Influence:
1. Verify build completes successfully without removed components
2. Test remaining functionality in the API package
3. Ensure no dependencies on removed modules in other packages
4. Check that system theme management still works through other services
5. Confirm file thumbnail generation is handled by other components

chore: 移除已弃用的主题和缩略图模块

1. 移除 cursor-helper DBus 服务及相关文件
2. 移除用于生成主题预览的 theme_thumb 模块
3. 移除用于主题管理和扫描的 themes 模块
4. 移除用于文件缩略图生成的 thumbnails 模块
5. 移除 thumbnailer 二进制文件
6. 更新 Makefile 从构建中排除已移除的组件
7. 这些模块已迁移到其他仓库或不再需要

Influence:
1. 验证构建在没有移除组件的情况下成功完成
2. 测试 API 包中剩余的功能
3. 确保其他包不依赖已移除的模块
4. 检查系统主题管理是否仍通过其他服务正常工作
5. 确认文件缩略图生成由其他组件处理

Author: mhduiy

Makefile

@@ -11,7 +11,6 @@ INSTALL_LOCALE_HELPER ?= 0
 TESTS = \
 	${GOPKG_PREFIX}/adjust-grub-theme \
 	${GOPKG_PREFIX}/blurimage \
-	${GOPKG_PREFIX}/cursor-helper \
 	${GOPKG_PREFIX}/dde-open \
 	${GOPKG_PREFIX}/deepin-shutdown-sound \
 	${GOPKG_PREFIX}/device \
@@ -38,30 +37,10 @@ TESTS = \
 	${GOPKG_PREFIX}/session \
 	${GOPKG_PREFIX}/sound-theme-player \
 	${GOPKG_PREFIX}/soundutils \
-	${GOPKG_PREFIX}/theme_thumb \
-	${GOPKG_PREFIX}/theme_thumb/common \
-	${GOPKG_PREFIX}/theme_thumb/cursor \
-	${GOPKG_PREFIX}/theme_thumb/gtk \
-	${GOPKG_PREFIX}/theme_thumb/icon \
-	${GOPKG_PREFIX}/themes \
-	${GOPKG_PREFIX}/themes/scanner \
-	${GOPKG_PREFIX}/thumbnailer \
-	${GOPKG_PREFIX}/thumbnails \
-	${GOPKG_PREFIX}/thumbnails/cursor \
-	${GOPKG_PREFIX}/thumbnails/font \
-	${GOPKG_PREFIX}/thumbnails/gtk \
-	${GOPKG_PREFIX}/thumbnails/icon \
-	${GOPKG_PREFIX}/thumbnails/images \
-	${GOPKG_PREFIX}/thumbnails/loader \
-	${GOPKG_PREFIX}/thumbnails/pdf \
-	${GOPKG_PREFIX}/thumbnails/text \
 	${GOPKG_PREFIX}/userenv \
 	${GOPKG_PREFIX}/validator
 
 LIBRARIES = \
-    thumbnails \
-    themes \
-    theme_thumb\
     dxinput \
     drandr \
     soundutils \
@@ -83,9 +62,7 @@ BINARIES =  \
     device \
     graphic \
     locale-helper \
-    thumbnailer \
     hans2pinyin \
-    cursor-helper \
     gtk-thumbnailer \
     sound-theme-player \
     deepin-shutdown-sound \