chore: clean up repo for public release

- Remove BMAD framework, IDE configs, dev screenshots, test files,
  internal docs, and backup files
- Rename keep-notes/ to memento-note/
- Update all references from keep-notes to memento-note
- Add Apache 2.0 license with Commons Clause (non-commercial restriction)
- Add clean .gitignore and .env.docker.example

.agent/skills/bmad-generate-project-context/project-context-template.md

@@ -1,21 +0,0 @@
----
-project_name: '{{project_name}}'
-user_name: '{{user_name}}'
-date: '{{date}}'
-sections_completed: ['technology_stack']
-existing_patterns_found: { { number_of_patterns_discovered } }
----
-
-# Project Context for AI Agents
-
-_This file contains critical rules and patterns that AI agents must follow when implementing code in this project. Focus on unobvious details that agents might otherwise miss._
-
----
-
-## Technology Stack & Versions
-
-_Documented after discovery phase_
-
-## Critical Implementation Rules
-
-_Documented after discovery phase_