chore(agent): configure AI agents and tools

Add configuration for BMad, Claude, OpenCode, and other AI agent tools and workflows.

_bmad/bmm/workflows/excalidraw-diagrams/create-dataflow/workflow.yaml

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+name: create-excalidraw-dataflow
+description: "Create data flow diagrams (DFD) in Excalidraw format"
+author: "BMad"
+
+# Config values
+config_source: "{project-root}/_bmad/bmm/config.yaml"
+output_folder: "{config_source}:output_folder"
+
+# Workflow components
+installed_path: "{project-root}/_bmad/bmm/workflows/excalidraw-diagrams/create-dataflow"
+shared_path: "{project-root}/_bmad/bmm/workflows/excalidraw-diagrams/_shared"
+instructions: "{installed_path}/instructions.md"
+validation: "{installed_path}/checklist.md"
+
+# Core Excalidraw resources (universal knowledge)
+helpers: "{project-root}/_bmad/core/resources/excalidraw/excalidraw-helpers.md"
+json_validation: "{project-root}/_bmad/core/resources/excalidraw/validate-json-instructions.md"
+
+# Domain-specific resources (technical diagrams)
+templates: "{shared_path}/excalidraw-templates.yaml"
+library: "{shared_path}/excalidraw-library.json"
+
+# Output file (respects user's configured output_folder)
+default_output_file: "{output_folder}/excalidraw-diagrams/dataflow-{timestamp}.excalidraw"
+
+standalone: true