docs: update README for 6-agent architecture with reporting_agent

feat: add reporting_agent as 5th worker agent (6 agents total)

refactor: update tools/__init__.py for new reporting module

feat: add reporting_tools.py with 4 tools for new reporting_agent

refactor: move IncidentReportGeneratorTool to reporting_tools.py

Fix: pass HF_TOKEN to InferenceClientModel

Add comprehensive README

Add app.py

Add sre_agent/agent.py

Add sre_agent/tools/infrastructure_tools.py

Add sre_agent/tools/remediation_tools.py

Add sre_agent/tools/alerting_tools.py

Add sre_agent/tools/rca_tools.py

Add sre_agent/tools/log_analysis_tools.py

Add sre_agent/tools/timeseries_tools.py

Add requirements

Add sre_agent package

Add tools package init

initial commit