[Fix/#3] Correct initial hour selection and include 0 in 24-hour TimePicker

[DongChyeon]

🎯 Related Issue

• Closes 🐞 Bug - 24 Hour TimePicker displays wrong initial hour and excludes 0 #3

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📝 Description

What does this PR do?

Change 24 Hour TimePicker hour range to include 0, which naturally fixes incorrect initial hour selection.

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✅ Changes

• Update hourItems in 24-hour TimePicker from (1..23) to (0..23).
• Initial hour selection now works correctly without additional calculation changes.

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🔍 Screenshots / Test Results (if applicable)

N/A

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👤 Reviewer Checklist

N/A

[Copilot]

Pull Request Overview

This PR adjusts the 24-hour TimePicker to include 0 in its selectable hours, which also corrects the initial hour selection logic.

• Expanded hourItems range from 1..23 to 0..23.
• No other calculation changes needed to fix initial selection.

Comments suppressed due to low confidence (1)

timepicker/src/main/java/com/dongchyeon/timepicker/TimePicker.kt:257

• Add a unit or UI test to verify that hourItems includes 0 and that the initial selected hour is correctly set to the first item (0) when using the 24-hour picker.

    val hourItems = remember { (0..23).toList() }