feat: set default user and workdir when using Dockerfile

[dobrac]

Set default user for Dockerfiles. Includes also small migrate fixes.

---

Note

Defaults Dockerfile-based templates to user 'user' and workdir '/home/user', updates CLI templates (sudo start/ready, relative Python import), and allows template migration without a config file.

• SDKs (Dockerfile parsing):
  • JS (packages/js-sdk/src/template/dockerfileParser.ts) and Python (packages/python-sdk/e2b/template/dockerfile_parser.py): after parsing, set defaults setUser('user') and setWorkdir('/home/user').
• CLI Templates:
  • Python build scripts: switch to relative import from .template import template.
  • Generated template hbs: start/ready commands now prefixed with sudo; removed explicit root/workdir before start/ready.
• CLI Migrate:
  • Supports migration without e2b.toml; uses default config values and prints a warning instead of exiting.
  • Initializes default config when missing; success messaging adjusted.
• Tests:
  • Update fixtures to reflect new defaults (set_user('user'), set_workdir('/home/user'), sudo start/ready, relative imports).
  • Relax error case to succeed with warning when config is missing.
  • Comment out stacktrace tests for fromDockerfile in JS/Python until fixed.
• Changesets: Patch bumps for @e2b/cli, @e2b/python-sdk, and e2b.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 934dc3b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@e2b/cli	Patch
@e2b/python-sdk	Patch
e2b	Patch

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[mishushakov]

i will check the tests, meanwhile change the relative import .template to absolute e2b.template

[dobrac]

i will check the tests, meanwhile change the relative import .template to absolute e2b.template

The relative .template is in fixtures. That should be correct there.

Commented out the fromDockerfile/from_dockerfile stacktraces tests for now as they're broken. We'll fix it in a future PR.