feat: popover (#7)

* feat: popover

* feat: 文档完善

* feat:  样式完善

Author: vaebe

.codeflicker/specs/tooltip-component-development.md

@@ -37,4 +37,5 @@ packages/ccui/build
 packages/ccui/coverage
 packages/ccui/ui/**/__snapshots__
 .pnpm-debug.log
-.claude
+.claude
+.codeflicker