Process minimum version from plist or set default value

[jperedadnr]

Issue

Fixes #1361

Progress

• Change must not contain extraneous whitespace
• License header year is updated, if required
• Verify the contributor has signed Gluon Individual Contributor License Agreement (CLA)

[Copilot]

Pull request overview

This PR fixes the iOS packaging flow so MinimumOSVersion is no longer hard-coded to 12.0 and can be sourced from Default-Info.plist, falling back to a centralized default when missing/invalid. It also consolidates the default iOS minimum OS version into a shared constant for reuse across iOS build steps.

Changes:

• Read MinimumOSVersion from the plist during iOS Info.plist processing and use it when generating the final plist.
• Add validation/clamping of the minimum OS version with a default (Constants.DEFAULT_IOS_MIN_OS_VERSION).
• Replace hard-coded -mios-version-min=12.0 flags with the centralized default constant.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/main/java/com/gluonhq/substrate/util/ios/InfoPlist.java	Reads/validates MinimumOSVersion from the plist and applies it when generating the final Info.plist and when invoking Xcode tools.
src/main/java/com/gluonhq/substrate/target/IosTargetConfiguration.java	Uses the centralized default iOS min OS version constant for compiler/linker flags.
src/main/java/com/gluonhq/substrate/Constants.java	Introduces DEFAULT_IOS_MIN_OS_VERSION constant and updates copyright year.

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