XCodeV5 - Option to skip initial build if building for packing only

[wscld]

Context

Currently, when users want to package an app (create an IPA), the Xcode task always performs a full build step followed by archive and export operations. This results in redundant work.

---

Task Name

XcodeV5

---

Description

Added a new boolean input skipBuildStep to the Xcode task that allows users to skip the initial Xcode build phase and go directly to the packaging (archive + export) phase. This enhancement:

• Adds a new optional input skipBuildStep that is only visible when packageApp is enabled
• Updates the build logic to conditionally skip the initial xcodebuild execution when the flag is enabled
• Maintains backward compatibility - existing pipelines continue to work unchanged
• Optimizes build performance for scenarios where only packaging is needed
• Includes comprehensive unit tests to verify the new functionality

---

Risk Assessment (Low / Medium / High)

Low

---

Unit Tests Added or Updated (Yes / No)

Yes

---

Additional Testing Performed

No

---

Documentation Changes Required (Yes / No)

No

---

Checklist

• Related issue linked (if applicable)
• Task version was bumped — see versioning guide
• Verified the task behaves as expected