feat: implement native-as-source version management

[najuna-brian]

Descripton

Eliminates all hardcoded version numbers and establishes native platform configs as the single source of truth.

Changes

React Native App (formulus)

• New: scripts/sync-version-to-package.js - Generates src/version.ts from build.gradle
• Updated: FormulusMessageHandlers.ts - Uses AppVersionService instead of hardcoded '0.1.0-native'
• Updated: FormulusInterfaceDefinition.ts - Manual FORMULUS_INTERFACE_VERSION (separate from app version)
• Scripts: generate:version runs on prebuild/prestart

Web Component (formulus-formplayer)

• New: scripts/sync-version-from-parent.js - Syncs version from RN app
• Updated: FormulusInterfaceDefinition.ts - Manual FORMULUS_INTERFACE_VERSION
• Scripts: sync:version runs on prebuild/prestart

Generated Files

Both projects now have auto-generated src/version.ts:
export const APP_VERSION = '1.0'; // From native configs## Workflow

Update app version:

1. Update android/app/build.gradle → versionName = "1.1.0"
2. Update iOS project.pbxproj → MARKETING_VERSION = 1.1.0
3. Build/start auto-regenerates version files

Update interface version:
Manually bump FORMULUS_INTERFACE_VERSION in both interface definition files (only on breaking changes).

Rule: App version comes from native configs. Generated version.ts files propagate it. Interface version is manually maintained separately.

Closes #115