chore: start 1.23.0-SNAPSHOT

[forkline-bot]

Bump version to 1.23.0-SNAPSHOT to begin the next development cycle after the 1.22.0 release.

---

This PR was generated by Forkline — AI-powered code contributions.
The agent analyzed the issue and implemented this fix autonomously.

[forkline-bot]

Maintainability Review

Initial expected implementation: matched
Initial reason: version.properties correctly set to 1.23.0-SNAPSHOT (versionCode=12300), CHANGELOG has empty [Unreleased] section above 1.22.0, and auto-tag workflow correctly skips SNAPSHOT versions.
Applied maintenance work: Fixed requireNotNull ordering bug in VersioningPlugin.
Final implementation: matches
Validation: build-logic compiles successfully, spotless formatting passes.

---

Finding 1: requireNotNull wraps wrong expression

• Priority: medium
• Category: bug
• Decision: applied
• Location: build-logic/.../versioning/VersioningPlugin.kt:43
• Problem: requireNotNull was wrapping .toInt() (returns non-nullable Int) instead of getProperty() (returns nullable platform type). The custom error message was unreachable — a missing property would NPE at .toInt() before requireNotNull could fire.
• Action: Moved .toInt() outside requireNotNull so the null check on the property value works as intended.
• Why it is worth it: Corrects broken error handling with a one-line change; zero behavioral change when the property exists.
• Risk / scope: Minimal — build-logic only, no runtime app impact.