Add MCP feature

[Yuki-Imajuku]

No description provided.

[Copilot]

Pull Request Overview

Adds full support for the new MCP (Model Context Protocol) feature, including a dedicated server package, updated infrastructure provisioning, automation scripts, and documentation.

• Introduces ale_bench_mcp_server Python project and its dependencies
• Extends Terraform and cloud-init to allow a custom setup script and adds setup_mcp.sh
• Streamlines Docker helper scripts and enriches the README with MCP usage instructions

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
scripts/docker_rmi_all.sh	New script to bulk-remove ALE-Bench Docker images
scripts/docker_push_all.sh	Simplified remote parameter assignment
scripts/docker_pull_all.sh	Simplified remote parameter assignment
scripts/docker_build_base_all.sh	Simplified remote parameter assignment
scripts/docker_build_all.sh	Merged user_id/group_id defaults into single-line assignments
mcp/pyproject.toml	Added project metadata and dependencies for the MCP server
cloud/variables.tf	Defined setup_file_name variable for custom user_data scripts
cloud/setup_mcp.sh	New instance setup script tailored for MCP server environment
cloud/setup.sh	Updated UV install URL to latest channel
cloud/main.tf	Switched user_data to use configurable var.setup_file_name
README.md	Added MCP server documentation and updated lint/test commands

Comments suppressed due to low confidence (1)

scripts/docker_push_all.sh:6

• The list of image tags is duplicated across several scripts (push, pull, build, rmi). Consider extracting the tag list into a shared array or file and looping over it to reduce repetition and simplify future updates.

docker image push ${remote}:cpp17-201907