feat(camera)!: migrate to @nativescript-community/perms v3

[NathanWalker]

Part of the perms v2 → v3 migration.

The bug

perms v3 resolves request() to a Status string, not the v2 [Status, boolean] tuple. mapStatus read it as a tuple:

if (result && result.length > 1) {
  if (Object.keys(Status).findIndex((k) => k === result[0]) >= 0) {
    status = Status[result[0]];
  }
}

Against v3, 'authorized'.length > 1 passes and result[0] is 'a', which matches no Status key. Every result mapped to Status.unknown, so requestPermissions(), requestCameraPermissions() and requestPhotosPermissions() all reported Success: false even when the user granted access.

function mapStatus(result: permissions.Status): Status {
  return Status[result] ?? Status.unknown;
}

The unknown-status fallback is preserved; the exported PermissionResult / PermissionsResult shapes are unchanged, so index.d.ts needs no edit.

Verification

nx build camera clean against perms 3.0.11 (with #679 applied).

Merge order

Needs #679. Merge alongside the other three migrations.

🤖 Generated with Claude Code

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