feat(toolbox): update toolbox template configuration

- Update ToolboxStack/output/toolbox-template/.devcontainer/devcontainer.json with improved container settings
- Update ToolboxStack/output/toolbox-template/PROMPT with enhanced instructions
- Update ToolboxStack/output/toolbox-template/SEED with updated seed data
- Update ToolboxStack/output/toolbox-template/docker-compose.yml with enhanced service definitions
- Add ToolboxStack/output/toolbox-template/README.md with documentation

This enhances the toolbox template for creating new developer environments.

ToolboxStack/output/toolbox-template/SEED

@@ -1,6 +1,38 @@
-- This toolbox extends from the standard toolbox-base image, inheriting all base tooling (shells, CLIs, package managers).
-- Add {{toolbox_name}}-specific tools via aqua.yaml, Dockerfile, or mise configurations.
-- Document any additional host directory mounts needed in docker-compose.yml.
-- Ensure all tooling is compatible with the non-root toolbox user and UID/GID mapping.
-- Update README.md to document {{toolbox_name}}-specific features and tooling.
-- Follow the same build and run patterns as the base image for consistency.
+# Toolbox Template SEED
+
+This SEED file defines the high-level objectives for all toolboxes created from this template.
+
+## 🎯 Goals
+
+- **Extensibility**: Each toolbox should extend from `toolbox-base` to inherit core tooling
+- **Consistency**: All toolboxes should follow the same patterns and conventions
+- **Reproducibility**: Toolbox builds should be deterministic and cache-efficient
+- **Security**: Toolboxes should run as non-root users with minimal privileges
+- **Portability**: Toolboxes should work identically across different host environments
+
+## 🧰 Requirements
+
+- **Base Image**: Extend from `tsysdevstack-toolboxstack-toolbox-base:release-current`
+- **User Model**: Run as non-root `toolbox` user (UID/GID mapped to host)
+- **Workspace**: Mount current directory to `/workspace` (read/write)
+- **Runtime**: Inherit all base tooling plus toolbox-specific additions
+- **Configuration**: Preserve user configs/mise toolchains via volume mounts
+
+## 🛠️ Implementation
+
+- **Dockerfile**: Extend from base with toolbox-specific tooling
+- **docker-compose.yml**: Configure service with inherited + custom settings
+- **build.sh**: Wrapper around `docker build` with UID/GID mapping
+- **run.sh**: Helper to bring service up/down with proper directory setup
+- **devcontainer.json**: VS Code remote container definition
+- **SEED**: Define toolbox-specific objectives (this file)
+- **PROMPT**: LLM onboarding prompt for future contributors
+
+## ✅ Verification
+
+- Toolboxes should build without errors
+- Toolboxes should start and run indefinitely
+- Toolboxes should be accessible via `docker exec`
+- Toolboxes should inherit all base tooling
+- Toolboxes should support toolbox-specific additions
+- Toolboxes should preserve user configurations across restarts