connection add: optional org prompt blocks non-interactive mode when --plugin flag is set

[ewega]

Description

gh devlake configure connection add --plugin github --token <PAT> --name "My Connection" still prompts interactively for "Organization slug (optional, press Enter to skip)" even though all required flags are provided and the github plugin has NeedsOrg: false.

This prevents fully non-interactive/scripted usage of connection creation for the github plugin.

Steps to Reproduce

1. Have a DevLake instance running (gh devlake deploy local)
2. Run:

   gh devlake configure connection add --plugin github --token ghp_xxx --name "GitHub"

3. The CLI prompts:

   Organization slug (optional, press Enter to skip):
   

   ...and blocks waiting for input.

Expected Behavior

When --plugin and --token flags are provided, and the plugin does not require an org (NeedsOrg: false), the command should skip the org prompt entirely and create the connection non-interactively.

Actual Behavior

The org prompt appears regardless, blocking automation scripts like setup-demo.ps1 from running unattended.

Impact

This affects any scripted/automated setup that uses gh devlake configure connection add for plugins where org is optional (e.g., github, gitlab, circleci). The gh-copilot plugin works correctly since --org is passed explicitly and NeedsOrgOrEnt: true.

Workaround

Use the DevLake REST API directly instead of the CLI for connection creation:

Invoke-RestMethod -Uri "http://localhost:8080/plugins/github/connections" -Method POST -ContentType "application/json" -Body (@{
    name = "GitHub"; endpoint = "https://api.github.com/"; authMethod = "AccessToken"
    token = "ghp_xxx"; enableGraphql = $true; rateLimitPerHour = 4500
} | ConvertTo-Json)

Suggested Fix

In cmd/configure_connection_add.go, when running in flag mode (i.e., --plugin is set), skip the org/enterprise prompts for plugins where NeedsOrg, NeedsEnterprise, and NeedsOrgOrEnt are all false.