refactor: Asset module code for better readability

[khushi8112]

Asset Module Refactor PR

This PR refactors the asset module to improve code structure, fix bugs, and enhance maintainability. Testing is a priority to ensure no regressions are introduced.

Refactoring Tasks

Asset Repair

• Asset Repair Depreciation
• Asset Repair (UI)
• Test cases

Asset Value Adjustment

• Refactored and improved logic
• Test cases

Depreciation Methods

• Shift-Based Depreciation
• Straight-Line Method (70%)
• Daily Pro-Rata Depreciation
• Written Down Value Method
• Journal Entry for Depreciation
• Test cases

Asset Disposal

• Asset Selling
• Scraping Asset
• Test cases

Asset Splitting and Shift Allocation

• Code cleanup and improvements
• Test cases

Asset Capitalization

• Code cleanup and improvements
• Test cases

Misc

• Fix failing test cases (In progress)
• Write additional test cases for better coverage (focus on edge cases)
• Update documentation to reflect changes in the refactored code