feat(#9261): add --project-name and --cht-version flags to cht-docker-compose.sh

[vikrantwiz02]

Description

Closes #9261.

The cht-docker-compose.sh script previously relied entirely on interactive prompts (read -rp, select menus), making it impossible to use in CI/CD pipelines or scripted workflows. This was the root cause of the stdin.write('y\n') workaround in medic/cht-conf#620, which is fragile and breaks any time a prompt is added or removed.

This PR adds two optional flags to the script:

Flag	Short	Description
--project-name NAME	-n	Create or start a named project without interactive prompts
--cht-version VERSION	-V	Specify the CHT version to use (defaults to latest)

New non-interactive usage:

# Create a new project using the latest CHT version
./cht-docker-compose.sh --project-name myproject

# Create a new project with a specific CHT version
./cht-docker-compose.sh --project-name myproject --cht-version 4.10.0

# Start an existing project by name (skips creation if .env already exists)
./cht-docker-compose.sh --project-name myproject

All 4 existing usage patterns are fully preserved (no breaking changes):

./cht-docker-compose.sh                         # interactive (unchanged)
./cht-docker-compose.sh ENV-FILE.env            # start by file (unchanged)
./cht-docker-compose.sh ENV-FILE.env stop       # stop (unchanged)
./cht-docker-compose.sh ENV-FILE.env destroy    # destroy (unchanged)

Implementation details:

• Argument parsing replaced with a standard while/shift flag loop; flags must precede any positional .env argument (conventional Unix behaviour)
• Project name is sanitized (lowercased, non-alphanumeric chars replaced with _) matching the existing interactive behaviour
• If --project-name is given and the .env already exists, the script skips creation and starts the existing project using its existing .env, compose files, and data in $HOME/.medic/cht-docker/
• --help / -h moved into the flag loop and updated to document the new flags
• Unknown flags produce an error message and exit 1

Code review checklist

• UI/UX backwards compatible~~
• Readable: Concise, well named, follows the style guide
• Documented: Configuration and user documentation on cht-docs~~
• Tested: Mocha unit tests added (scripts/docker-helper/tests/cht-docker-compose.spec.js); npm run unit-docker-helper runs 11 tests covering all new flags and backwards-compatible paths; npm run lint passes clean
• Internationalised~~
• Backwards compatible: All 4 existing positional usage patterns preserved unchanged; existing .env files, compose files, and project data directories are read without modification
• AI disclosure: Please disclose use of AI per the guidelines.

License

The software is provided under AGPL-3.0. Contributions to this project are accepted under the same license.

[vikrantwiz02]

@jkuester, it's ready for review. Thanks.