refactor: remove obsolete issue management system in favor of issue-facade

Complete cleanup of the legacy TDD AI and issue management system, establishing clear separation of concerns as requested. All issue handling is now provided by the standalone issue-facade system.

Removed components:
- TDD AI framework (tddai/ directory and tddai_cli.py)
- Legacy issue management CLI commands and services
- Issue-related Makefile targets and helper commands
- Obsolete tests and infrastructure dependencies
- Finance modules that depended on the old issue system

Updated:
- Makefile: Removed issue-*, tdd-*, and test-from-issue commands
- CLI framework: Simplified to core functionality only
- Documentation: Added deprecation notice for old config system

The issue-facade now serves as the universal CLI for issue tracking,
providing backend-agnostic interface to GitHub, GitLab, Gitea, and
local SQLite storage as documented in issue-facade/README.md.

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

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

markitect/cli.py

@@ -109,8 +109,6 @@ from .schema_generator import SchemaGenerator
 from .schema_validator import SchemaValidator
 from .exceptions import FileNotFoundError, InvalidDepthError, SchemaValidationError, InvalidSchemaError
 
-# Issue management commands - also available via dedicated 'issue' CLI or 'tddai' CLI
-from .issues.commands import issues_group
 
 # Global options for CLI configuration
 pass_config = click.make_pass_decorator(dict, ensure=True)
@@ -6184,23 +6182,12 @@ cli.add_command(wishlist_group)
 
 
 # Register issue management commands
-cli.add_command(issues_group)
 
-# Register issue activity tracking commands
-from markitect.issues.activity_commands import activity as activity_group
-cli.add_command(activity_group)
 
 # Register worktime tracking commands
 from markitect.finance.worktime_commands import worktime as worktime_group
 cli.add_command(worktime_group)
 
-# Register day wrap-up commands
-from markitect.finance.day_wrapup_commands import wrapup as wrapup_group
-cli.add_command(wrapup_group)
-
-# Register issue wrap-up commands
-from markitect.issues.issue_wrapup_commands import issue_wrapup as issue_wrapup_group
-cli.add_command(issue_wrapup_group)
 
 
 # Query Paradigm Commands - Issue #62