[FEATURE] fab git connect - Connect workspace to git

Use Case / Problem

To allow for git creation of branch out workspace, enable git connect commands so connect a workspace to Azure DevOps code repo. This is possible in the UI, SDK and REST API however not in fabric-cli library.

https://learn.microsoft.com/en-us/rest/api/fabric/core/git/connect?tabs=HTTP

Proposed Solution

fab git connect "dev_workspace.Workspace/.branches/featureX" \
  --remoteGitRepositoryUrl "https://dev.azure.com/myorg/myproject/_git/myrepo" \
  --remoteGitBranch "main" \
  --personalAccessToken "$AZURE_DEVOPS_PAT" \
  --repositoryType "AzureDevOps"

Alternatives Considered

Currently possible in REST APIs it seems

Impact Assessment

• This would help me personally
• This would help my team/organization
• This would help the broader fabric-cli community
• This aligns with Microsoft Fabric roadmap items

Implementation Attestation

• I understand this feature should maintain backward compatibility with existing commands
• I confirm this feature request does not introduce performance regressions for existing workflows
• I acknowledge that new features must follow fabric-cli's established patterns and conventions

Implementation Notes

No response

Start by reading the existing fab git commands and their tests to identify the established command and authentication patterns, then review the linked Microsoft Fabric Git connect REST endpoint. Add a connect command supporting the options shown in the issue and verify that it connects an Azure DevOps repository without changing existing commands.