Add list-orgs and list-projects discovery commands to recce-cloud CLI

[Copilot]

PR checklist

• Ensure you have added or ran the appropriate tests for your PR.
• DCO signed

What type of PR is this?

Feature addition

What this PR does / why we need it:

Adds two discovery commands to help users find their organization and project names without opening the web UI.

Changes:

• API Client (recce_cloud/api/client.py): Added list_organizations() and list_projects(org_id) methods

  • GET /api/v2/organizations - returns user's accessible orgs
  • GET /api/v2/organizations/{org_id}/projects - returns org's projects

• CLI Commands (recce_cloud/cli.py):

  • recce-cloud list-orgs - displays orgs in table or JSON format
  • recce-cloud list-projects --org <name> - displays projects in table or JSON format
  • Both require RECCE_API_TOKEN environment variable
  • Both support --json flag for machine-readable output

• Tests: 19 new tests (7 API + 12 CLI) covering success/error paths, output formats, and auth failures

Usage:

# List organizations
$ recce-cloud list-orgs
Organizations
┏━━━━┳━━━━━━━┳━━━━━━━━━━━━━━━━━┓
┃ ID ┃ Name  ┃ Display Name    ┃
┡━━━━╇━━━━━━━╇━━━━━━━━━━━━━━━━━┩
│ 1  │ myorg │ My Organization │
└────┴───────┴─────────────────┘

# List projects with JSON output
$ recce-cloud list-projects --org myorg --json
[
  {"id": 10, "name": "dbt-project", "display_name": "DBT Project"}
]

Which issue(s) this PR fixes:

DRC-2270

Special notes for your reviewer:

Implementation mirrors the existing list-organizations and list-projects commands in the main recce CLI (recce/cli.py) but adapted for the lightweight recce-cloud package which uses RecceCloudClient instead of RecceCloud.

Does this PR introduce a user-facing change?:

Yes. Two new commands enable CLI-based discovery of organizations and projects:

• recce-cloud list-orgs - list accessible organizations
• recce-cloud list-projects --org <name> - list projects in an organization

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