Add interactive iOS device installer

[MarcusJRLee]

Summary

• add one interactive scripts/install_ios.sh entry point that asks for an available paired iPhone and Development or Local QA configuration
• build, validate, install, and launch the local-only iOS app without deleting existing apps
• add integration coverage for the CLI contract, device filtering, configuration mapping, installation failure propagation, and Apple's free-profile app cap
• mark the integrated macOS personal QA build as unreleased version 1.5.0 build 18

Verification

• scripts/check.sh
• scripts/check_ios.sh
• real paired iPhone Development build and install attempt
• real paired iPhone interactive Local QA build and install attempt
• signed macOS candidate build, strict signature and Team verification, canonical install, and launch

The real iPhone reached Apple's free-development-profile app cap after both signed builds passed validation. The installer returned a failure with actionable guidance and did not remove any installed app.

No tag, GitHub Release, DMG, notarization, or public distribution is included.