fix(Datepicker): expose focus() and clear() methods via ref.

[MiroslavPetrik]

Closes #1299 (possibly #1039)

• I have followed the Your First Code Contribution section of the Contributing guide

Summarize the changes made and the motivation behind them.

Enhanced the Datepicker component to expose clear() and focus() ref methods.
This is required when datepicker value is in controlled mode.

Reference related issues using # followed by the issue number.

Closes #1299 and (possibly #1039)

If there are breaking API changes - like adding or removing props, or changing the structure of the theme - describe them, and provide steps to update existing code.

No breaking changes.

Summary by CodeRabbit

• New Features
  • Enhanced the Datepicker component to support direct manipulation through focus and clear methods.
• Refactor
  • Improved the Datepicker component's architecture for better usability and control.
• Tests
  • Added new tests to ensure the functionality of focusing and clearing values in the Datepicker component.

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[coderabbitai]

Walkthrough

This update significantly enhances the Datepicker component by integrating forwardRef and useImperativeHandle, allowing for direct manipulation via a ref. It introduces a DatepickerRef interface, offering focus and clear methods for external control. Furthermore, it improves internal functions and beefs up testing with new utilities and tests for the added methods, ensuring the component’s robustness and flexibility in handling user interactions.

Changes

File	Change Summary
src/components/Datepicker/Datepicker.tsx	- Refactored to use forwardRef and useImperativeHandle - Exposed DatepickerRef interface with focus and clear methods - Adjusted internal functions for better control - Added tests for focusing input and clearing value using ref.current
src/components/Datepicker/Datepicker.spec.tsx	- Added tests for focusing input and clearing value using ref.current

Assessment against linked issues

Objective	Addressed	Explanation
Enable forwarding of ref to the Datepicker component (#1299)	✅
Implement a programmatic API that exposes methods to the ref object using useImperativeHandle (#1299)	✅
Address the limitation of the Datepicker being uncontrolled and only accepting defaultValue but not the value prop (#1299)	✅
Implement a clear() method to reset the Datepicker value to the default (#1299)	✅
Allow the Datepicker to accept a ref for focusing the input programmatically (#1299)	✅

🐰✨📅✨🐰

A hop, a skip, in the code we dip,

To tweak and fix, with magic tricks.

Now with a tap, or a gentle click,

Focus, clear, all so slick.

In fields of dates, our choices stick.

🐰✨📅✨🐰

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.53%. Comparing base (7461173) to head (c8e46ba).
Report is 201 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1300      +/-   ##
==========================================
- Coverage   99.54%   95.53%   -4.02%     
==========================================
  Files         163      217      +54     
  Lines        6621     9665    +3044     
  Branches      401      558     +157     
==========================================
+ Hits         6591     9233    +2642     
- Misses         30      432     +402     

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Review Status

Actionable comments generated: 0

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between 31c9d9d and c8e46ba.

Files selected for processing (2)

• src/components/Datepicker/Datepicker.spec.tsx (2 hunks)
• src/components/Datepicker/Datepicker.tsx (5 hunks)

Files skipped from review as they are similar to previous changes (2)

• src/components/Datepicker/Datepicker.spec.tsx
• src/components/Datepicker/Datepicker.tsx