bugfix(cli): add version to output (#1314)

[bgm-malbeclabs]

Summary of Changes

This PR fixes a json rendering issue when the client is out of date. If the client was out of date and the user tried to return the status as json the json would be malformed as the version warning would be stuffed in.

Now it looks like this:
current:

{
  "version": {
    "status": "current"
  },
  "statuses": [...]
}

compatible:

{
  "version": {
    "status": "outdated",
    "current_version": "0.8.5",
    "latest_version": "0.9.0",
    "message": "A new version of the client is available: 0.8.5 → 0.9.0\nWe recommend updating to the latest version for the best experience."
  },
  "statuses": [...]
}

incompatible:

{
  "version": {
    "status": "incompatible",
    "current_version": "0.7.0",
    "min_required_version": "0.8.0",
    "message": "A new version of the client is available: 0.7.0 → 0.8.0\nYour client version is no longer up to date. Please update it before continuing to use the client."
  },
  "statuses": [...]
}

Closes #1314

Testing Verification

Unit tests have been added that show the output conforms to the expected result.

[Copilot]

Pull request overview

This PR fixes a JSON rendering issue where version warnings were being inserted into JSON output, causing malformed responses. The fix introduces structured version status information that is included in JSON responses and printed to stderr for table output.

Changes:

• Added VersionStatus enum and get_version_status function to provide structured version checking
• Modified status, routes, and latency commands to include version information in JSON responses
• Version warnings now print to stderr for table output to avoid breaking structured output

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
smartcontract/cli/src/checkversion.rs	Adds VersionStatus enum and get_version_status function with comprehensive unit tests
client/doublezero/src/command/status.rs	Wraps status response with version information for JSON output
client/doublezero/src/command/routes.rs	Wraps routes response with version information for JSON output
client/doublezero/src/command/latency.rs	Wraps latency response with version information for JSON output
CHANGELOG.md	Documents the addition of version field to JSON output

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