feat(amazonq): support Dockerfile files in /dev

[michaellandi]

Problem

Dockerfile files are not currently supported by /dev

Solution

Add a list of file prefixes that are considered code files for /dev. This approach supports not only Dockerfile but also popular variants of this such as Dockerfile.build, Dockerfile-prod, etc.

I manually tested some prompts in /dev with requests. I set breakpoints to see that the file was being zipped up in workspace upload.

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License: I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

• This pull request modifies code in src/* but no tests were added/updated.
  • Confirm whether tests should be added or ensure the PR description explains why tests are not required.
• This pull request implements a feat or fix, so it must include a changelog entry (unless the fix is for an unreleased feature). Review the changelog guidelines.
  • Note: beta or "experiment" features that have active users should announce fixes in the changelog.
  • If this is not a feature or fix, use an appropriate type from the title guidelines. For example, telemetry-only changes should use the telemetry type.

[avi-alpert]

Since this is a commit to public master please include a change log as described in CONTRIBUTING.md

[michaellandi]

Since this is a commit to public master please include a change log as described in CONTRIBUTING.md

Done, thanks.