chore: replace generic OK buttons with explicit action labels in dialogs

[siddhesh-06]

Purpose / Description

Uses explicit action labels (e.g., "Create", "Rename", "Add") instead of "OK" to comply with Material 2 dialog guidelines.

1. Replaced generic “OK” dialog buttons with explicit action labels like “Add”, “Create”, and “Rename”.
2. Updated multiple dialogs to improve clarity and follow Material dialog guidelines.
3. Centralized positive button text selection for deck dialogs based on dialog type.

Fixes

• Fixes Inconsistnecies between dialog messages #18553

Screenshots

Before fix

After fix

Approach

Replace OK labels with explicit action labels

How Has This Been Tested?

Tested on Pixel 9 OS 16 - emulator device

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the [Google Accessibility Scanner]

[david-allison]

One tiny nitpick, then looks good to go for me

[david-allison]

FANTASTIC, cheers!