shop and inventory component updated

[Tianyuanhaimo]

Description

update shop and inventory component
Task: shop and inventory
Feature: Shop & Inventory Refinements

Milestones

List of steps that need to be completed for this task.

• update file path for arming the main character with different combinations of weapons
• implementation of buttons changing colour on click (Aug. 20)
• update pricing of items (Aug. 23)
• change sprites for items in the shop (Aug. 23)

Documentation

• Main description of feature
• JavaDoc
• ...

Member

• Name (GitHub Username) (Slack Handle)
• e.g. Richard (@applebyter) (Richard Thomas)