move agent builder docs, create workflow builder docs, and a new workflow builder to conform to stepwise workflow creation

src/modules/bmb/workflows-legacy/edit-workflow/workflow.yaml

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+# Edit Workflow - Workflow Editor Configuration
+name: "edit-workflow"
+description: "Edit existing BMAD workflows while following all best practices and conventions"
+author: "BMad"
+
+# Critical variables load from config_source
+config_source: "{project-root}/{bmad_folder}/bmb/config.yaml"
+communication_language: "{config_source}:communication_language"
+user_name: "{config_source}:user_name"
+
+# Required Data Files - Critical for understanding workflow conventions
+workflow_creation_guide: "{project-root}/{bmad_folder}/bmb/workflows/create-workflow/workflow-creation-guide.md"
+workflow_execution_engine: "{project-root}/{bmad_folder}/core/tasks/workflow.xml"
+
+# Reference examples
+workflow_examples_dir: "{project-root}/{bmad_folder}/bmm/workflows/"
+
+# Module path and component files
+installed_path: "{project-root}/{bmad_folder}/bmb/workflows/edit-workflow"
+template: false # This is an action workflow - no template needed
+instructions: "{installed_path}/instructions.md"
+validation: "{installed_path}/checklist.md"
+
+standalone: true
+
+# Web bundle configuration
+web_bundle: false # BMB workflows run locally in BMAD-METHOD project