Refactor all occurrences of 'sheild' to 'shield' for clarity and consistency

[GitJohnFis]

Overview

Throughout the codebase, the variable and constant name 'sheild' is used instead of the correct spelling 'shield'. This includes class attributes, method names, and constants such as PLAYER_SHEILD_TIME. Refactoring these to 'shield' will improve code readability and maintainability.

Scope

• Rename all instances of sheild (including variables, attributes, and constants) to shield.
• Ensure that method names such as activate_sheild become activate_shield.
• Update any references to these identifiers in other parts of the codebase.
• Run the code to verify that all references have been updated and nothing is broken due to the renaming.

Example

Before:

def activate_sheild(self):
    self.sheild_active = True
    self.sheild_timer = PLAYER_SHEILD_TIME

After:

def activate_shield(self):
    self.shield_active = True
    self.shield_timer = PLAYER_SHIELD_TIME

Why this is a good first issue

• This is a straightforward find-and-replace refactor suitable for beginners.
• It improves overall code consistency and professionalism.
• It can be completed without deep knowledge of the codebase.