Add release management system and prepare v1.0.0 publication

- Add agent-releaseManager.md with comprehensive publication workflow guidance
- Add 6 release- prefixed make targets for structured release process:
  - release-check: Validate release readiness
  - release-prepare: Build packages and prepare release
  - release-test: Test publication via TestPyPI
  - release-publish: Publish to production PyPI
  - release-finalize: Post-release tasks (tags, GitHub releases)
  - release-rollback: Emergency rollback procedures
- Update pyproject.toml version from 0.1.0 to 1.0.0 for consistency with CHANGELOG.md
- Update installation documentation in README.md and GETTING_STARTED.md
  - Add current "from source" installation instructions
  - Maintain "from PyPI" instructions for post-publication
- Framework now ready for v1.0.0 publication with complete release workflow

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "kaizen-agentic"
-version = "0.1.0"
+version = "1.0.0"
 description = "AI agent development framework embracing continuous improvement (kaizen)"
 readme = "README.md"
 license = {file = "LICENSE"}