morphcloud: add env aws-sim plugin

[mpbb]

Adds a morphcloud CLI plugin: env aws-sim.

• Loaded via the morphcloud.cli_plugins entry point group.
• Implements create/list/get/start/pause/snapshot/restore/delete/connect against SIM_AWS_BASE_URL (default https://sim-aws.svc.cloud.morph.so).
• Includes unit tests for registration and request wiring.

Tested: pytest -q tests/unit/test_cli_env_aws_sim.py

[mpbb]

Pushed update: aws-sim connect now prints a detached connector command + docker exec example. Commit: 9744982 (branch magi/aws-sim-cli-plugin-20260129).

[mpbb]

Update: detached connector command now includes AWS defaults (region from bundle + dummy creds + AWS_PAGER). Commit: 28effc0.

[mpbb]

Update: now starts the connector as a detached docker container by default (prints command, supports --no-run, --replace, --container-name). Commit: 0ab8491.

[mpbb]

Update: no longer needs to write a bundle file by default; it passes the bundle via and emits helper scripts ( to source + wrapper that imports AWS_* + CA vars from /proc/1/environ). Commit: 98706e2.

[mpbb]

Update: removed the extra printed docker command/example block from output (helpers are still written). Commit: 6086177.