feat: add Desktop Icon and Workspace Sidebar; restructure Education workspace

- Add Desktop Icon for Education app
  - education/desktop_icon/education.json

- Introduce Workspace Sidebar for Education
  - education/workspace_sidebar/education.json
  - Adds organized sections (Admissions, Student Management, Academics, Assessment, Fee Management, Attendance, Tools, Setup, Reports)
  - Provides quick links to key DocTypes and Reports

- Revamp Education workspace layout
  - Update cards/sections, labels, and links for clearer navigation
  - Add Assessment/Fees/Attendance report groupings and tools

Author: tuwafula

education/desktop_icon/education.json

@@ -0,0 +1,21 @@
+{
+ "app": "education",
+ "bg_color": "gray",
+ "creation": "2026-03-24 17:21:10.011412",
+ "docstatus": 0,
+ "doctype": "Desktop Icon",
+ "hidden": 0,
+ "icon_type": "App",
+ "idx": 0,
+ "label": "Education",
+ "link_to": "Education",
+ "link_type": "Workspace Sidebar",
+ "logo_url": "/assets/education/edu-logo.svg",
+ "modified": "2026-03-24 17:21:10.011412",
+ "modified_by": "Administrator",
+ "name": "Education",
+ "owner": "Administrator",
+ "restrict_removal": 0,
+ "roles": [],
+ "standard": 1
+}