Rename IndeterminateProgressBar to ProgressBar, add determinite progress mode

[nodes11]

Platforms Impacted

• iOS
• visionOS
• macOS

Description of changes

The exisiting IndeterminateProgressBar only supports showing indeterminate progress and its name reflects that. We need a progress bar that can show both indeterminate and determinate progress.

This change renames to the IndeterminateProgressBar to ProgressBar (MSFProgressBar for Obj-C consumers) and adds a determinate progress mode.

Changes:

• A bulk rename of IndeterminateProgressBar to ProgressBar. I used Copilot to aid in this process.
• Added an optional progress property to the MSFProgressBarState (previously MSFIndeterminateProgressBarState), which when non-nil, enables the determinite mode for the progress bar.
• Added toggle to the demo controller so that both the indeterminate and determinate modes can be tested.

Binary change

(how is our binary size impacted -- see https://github.com/microsoft/fluentui-apple/wiki/Size-Comparison)

Verification

(how the change was tested, including both manual and automated tests)

Visual Verification

Simulator.Screen.Recording.-.iPad.Pro.13-inch.M5.-.2026-07-29.at.08.24.23.mov

Simulator.Screen.Recording.-.iPhone.17.Pro.-.2026-07-29.at.08.18.57.mov

Pull request checklist

This PR has considered:

• Light and Dark appearances
• iOS supported versions (all major versions greater than or equal current target deployment version)
• VoiceOver and Keyboard Accessibility
• Internationalization and Right to Left layouts
• Different resolutions (1x, 2x, 3x)
• Size classes and window sizes (iPhone vs iPad, notched devices, multitasking, different window sizes, etc)
• iPad Pointer interaction
• SwiftUI consumption (validation or new demo scenarios needed)
• Objective-C exposure (provide it only if needed)

Microsoft Reviewers: Open in CodeFlow