Update Structure of Manual.md

[Rohan-Shridhar]

Current structure:

1. Open gridcraft
2. Use the drawing canvas
3. Choose a color
4. Fill an area
5. Adjust the canvas grid
6. Edit your drawing
7. Export your canvas
8. Import an image

New structure:

1. Open gridcraft (keep it same)
2. Understand sections - Menu, Canvas, Tools

3. Adjust the canvas grid (keep it same, just change the order from 5th to 3rd)
4. Edit your drawing (update it)

• include a new tool tht was added in Background color #78
• include 3rd column with images showing each tool

5. Keyboard shortcuts table (separate it from Edit your drawing section)
6. Export your canvas - crop the image
7. Import an image - include an image

No changes in Quick Workflow