feat: add project icon picker component and integrate with project management

- Implemented ProjectIconPicker component for selecting project icons.
- Created ProjectIcon component to display selected icons.
- Updated calendar page to remove unused PageHeading component.
- Modified growth page to enhance UI and improve text clarity.
- Refactored index page to include project icons and improve layout.
- Added mine page for user profile management with avatar selection.
- Introduced projects-sort page for managing project order with drag-and-drop functionality.
- Enhanced projects page to allow icon selection when adding or editing projects.
- Updated record page to streamline user experience and improve form actions.
- Adjusted practice service to support project icon management.
- Added tests for project saving functionality to ensure correct handling of icons.
- Updated global type definitions to support SVG and PNG imports.

miniprogram/types/global.d.ts

@@ -2,3 +2,12 @@ declare const __API_BASE_URL__: string
 
 declare module '*.scss'
 
+declare module '*.png' {
+  const src: string
+  export default src
+}
+
+declare module '*.svg' {
+  const src: string
+  export default src
+}