add server version endpoint and client version display

[ilopezluna]

This pull request introduces comprehensive version reporting for both the client and server components, and ensures that version information is consistently injected, surfaced, and validated throughout the build, release, and test workflows.

[gemini-code-assist]

Summary of Changes

Hello @ilopezluna, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a robust versioning mechanism across the application. It ensures that version details are embedded into compiled binaries during the build process, exposes this information via a dedicated server API endpoint, and enhances the command-line interface to display both client and server version details. This provides improved transparency and diagnostic capabilities regarding the application's deployed state.

Highlights

• Version Embedding: The build process for the Go binaries has been updated to embed version information directly into the executables using ldflags.
• Server Version Endpoint: A new /version HTTP endpoint has been added to the server, allowing clients to query the server's running version.
• Enhanced CLI Version Command: The docker model-runner version command now displays detailed client information (version, OS/Arch) and attempts to fetch and display the server's version.
• Desktop Client API for Server Version: A new method ServerVersion() was added to the desktop client to facilitate fetching the server's version from the new endpoint.

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Changelog

• Dockerfile
  • Added build arguments for versioning.
  • Modified Go build commands to embed the version string.
• Makefile
  • Updated the build command to embed the Git version into the binary.
• cmd/cli/commands/version.go
  • Imported the runtime package.
  • Enhanced the version command to show client and server versions, including OS/Arch.
• cmd/cli/desktop/desktop.go
  • Defined ServerVersionResponse struct.
  • Implemented ServerVersion() method to fetch server version via API.
• main.go
  • Imported encoding/json.
  • Added a new /version HTTP endpoint.
• version.go
  • Created a new file to declare the Version variable.

Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/release.yml

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[gemini-code-assist]

Code Review

This pull request introduces versioning support by adding a /version endpoint to the server and a version command to the CLI. The version is injected at build time using ldflags, both in the Dockerfile and the local Makefile build. The CLI now displays both client and server versions. My review identifies a logic bug in the new CLI command that incorrectly reports server information in standalone mode, and a minor issue where an error is ignored in the new server endpoint. Code suggestions are provided for both issues.

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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[doringeman]

LGTM!