feat: implements alpine upstreams

[apoclyps]

What's Changed

This pull request introduces an update to the supported package formats to manage Alpine upstreams.

Dependency update:

• Bumped the cloudsmith-api dependency version from >=2.0.24,<3.0 to >=2.0.25,<3.0 in setup.py to ensure compatibility with the latest API features.

depends on:

• feat: bump release to 2.0.25 cloudsmith-api#88

Supported formats:

• Added "alpine" to the list of supported package upstreams in cloudsmith_cli/cli/commands/upstream.py.

[Copilot]

Pull request overview

This PR updates the CLI to support managing Alpine repository upstreams, aligning the CLI with the latest cloudsmith-api client capabilities.

Changes:

• Bump cloudsmith-api dependency to >=2.0.25,<3.0 (and pinned to 2.0.25 in the compiled requirements).
• Add "alpine" to the supported upstream formats list, enabling cloudsmith upstream alpine ... subcommands.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
setup.py	Bumps cloudsmith-api minimum version to ensure Alpine upstream endpoints are available in the client.
requirements.txt	Updates the pinned cloudsmith-api version to match the dependency bump.
cloudsmith_cli/cli/commands/upstream.py	Adds alpine to the dynamically-generated upstream command groups.

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