📝 docs: add comprehensive version management and CLI documentation

VERSION

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+# DanceLessonsCoach Version
+
+# Current Version (Semantic Versioning)
+MAJOR=1
+MINOR=1
+PATCH=1
+PRERELEASE=""
+
+# Auto-generated fields (do not edit manually)
+BUILD_DATE=""
+GIT_COMMIT=""
+GIT_TAG=""
+
+# Version Format: {MAJOR}.{MINOR}.{PATCH}-{PRERELEASE}
+# Example: 1.0.0, 1.0.0-alpha.1, 2.3.4-beta.2
+
+# Semantic Versioning Rules:
+# - MAJOR: Breaking changes, major features
+# - MINOR: Backwards-compatible features
+# - PATCH: Backwards-compatible bug fixes
+# - PRERELEASE: alpha, beta, rc (pre-release versions)
+
+# Changelog Reference:
+# See AGENT_CHANGELOG.md for version history