Document Windows app setup command

[tianmind-studio]

Summary

• Add the Windows PowerShell setup command to app/README.md.
• Keep the existing macOS/Linux bash setup.sh commands for iOS and Android.
• Clarify that iOS setup requires macOS/Xcode, so Windows developers should use the Android setup path.

Windows context

The repository already includes app/setup/scripts/setup.ps1, but the app README only showed the bash setup script. This gives Windows contributors a direct setup entrypoint from the local app README.

Testing

• Verified app/setup/scripts/setup.ps1 exists.
• Verified app/setup.sh exists.
• git diff --check

Docs-only change; no app build was run.

[greptile-apps]

Greptile Summary

This docs-only PR adds a Windows PowerShell setup command to app/README.md, giving Windows contributors a direct entrypoint that was previously undocumented despite setup.ps1 already existing in the repo. It also adds a note clarifying that iOS setup requires macOS/Xcode.

• The PowerShell path .\\setup\\scripts\\setup.ps1 android correctly resolves from the app/ directory (after step 1's cd app) and the script accepts android as a valid argument.
• The two code blocks (bash and PowerShell) sit side-by-side in step 2 without an explicit "OR" separator; they rely on the inline comments (# macOS/Linux and # Windows PowerShell) to signal they are mutually exclusive alternatives — this is legible but could momentarily confuse readers who skim past comments.
• Steps 3 and 4 still use bash-only syntax (cd ~/.ssh; ssh-add and flutter run), which is a pre-existing gap not introduced by this PR.

Confidence Score: 5/5

Documentation-only change that adds a correct and already-existing script path; safe to merge.

The referenced script exists at the documented path, accepts the android argument, and the cd app prerequisite step is already in place. No code is modified.

No files require special attention.

Important Files Changed

Filename	Overview
app/README.md	Adds a Windows PowerShell setup block for Android and a clarifying note about iOS requiring macOS/Xcode. Path .\setup\scripts\setup.ps1 correctly resolves from app/ after the cd app step.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Developer: cd app] --> B{Operating System?}
    B -->|macOS / Linux| C{Target Platform?}
    B -->|Windows| D[PowerShell: .\setup\scripts\setup.ps1 android]
    C -->|iOS| E[bash setup.sh ios]
    C -->|Android| F[bash setup.sh android]
    D --> G[Android device setup]
    E --> H[iOS device setup - requires Xcode]
    F --> G

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