fix: match PiliPlus IPA metadata

[aierlma]

Summary

• change the PiliPlus bundle identifier from com.example.PiliPlus to com.example.piliplus
• derive the app version from the first three components of the release name (2.1.2.3 → 2.1.2)
• regenerate the per-app and aggregate AltStore sources

Why

The latest official PiliPlus IPA (2.1.2.3) contains:

• CFBundleIdentifier: com.example.piliplus
• CFBundleShortVersionString: 2.1.2
• CFBundleVersion: 5281

AltStore/SideStore source metadata must match the downloaded IPA metadata exactly.

Verification

• inspected Payload/Runner.app/Info.plist from the official PiliPlus_ios_2.1.2+5281.ipa
• ran ./update.sh PiliPlus
• ran git diff --check
• checked the generated PiliPlus entries in apps/PiliPlus/apps.json and all-apps.json

[bebound]

Thanks. bundle_identifier = "com.example.piliplus" in config.toml is correct, the rest is not necessary.