feat: add --org flag to all relevant CLI commands

[devin-ai-integration]

Summary

Adds --org / -o flag to all relevant CLI commands so users can override the active org for workspace resolution without needing to run brev set {org} first. This prevents the common "instance not found" error when a user's active org doesn't match the org containing their workspace.

Commands updated:

• brev shell, brev open (initial scope)
• brev stop, brev copy, brev exec, brev port-forward
• brev create (gpucreate), brev reset, brev recreate
• brev ollama, brev workspacegroups

New shared utilities (pkg/cmd/util/):

• ResolveOrgFromFlag — resolves org from flag or falls back to active org
• GetUserWorkspaceByNameOrIDErrInOrg — workspace lookup in a specific org
• ResolveWorkspaceOrNodeInOrg — workspace-or-node lookup in a specific org
• GetAnyWorkspaceByIDOrNameInOrgErr — any-workspace (admin) lookup in a specific org

All commands with the flag also register tab completion via GetOrgsNameCompletionHandler, except ollama (hidden command) and workspacegroups (stub command). Commands whose store interfaces embed completions.CompletionStore already had GetOrganizations; GPUCreateStore, OllamaStore, and WorkspaceGroupsStore had GetOrganizations added explicitly.

notebook.go was updated to pass "" (default org) for the new RunPortforward parameter since it doesn't expose --org itself.

Updates since last revision

• Fixed CI: added GetOrganizations method to MockGPUCreateStore in gpucreate_test.go so the mock satisfies the updated GPUCreateStore interface.
• All 9 CI checks now pass (build, lint, fmt, tests, CodeQL, release-test, cli-output-compatibility).

Review & Testing Checklist for Human

• Manual test with two orgs: Run commands like brev stop <instance> --org <non-active-org>, brev shell <instance> --org <non-active-org>, brev create ... --org <non-active-org> to confirm correct workspace resolution across all updated commands.
• Verify default behavior unchanged: Run the same commands without --org and confirm they still use the active org as before.
• FindExternalNode still uses GetActiveOrganizationOrDefault() — when --org is passed, workspace lookup uses the resolved org, but the external node fallback in ResolveWorkspaceOrNodeInOrg still searches the active org. Decide if this inconsistency is acceptable for shell, open, copy, and port-forward.
• stop admin path — stopWorkspace falls back to GetAnyWorkspaceByIDOrNameInOrgErr for admins. Verify this works correctly when --org is passed and the workspace belongs to another user in that org.
• gpucreate removed nil guard — newCreateContext previously checked if org == nil after GetActiveOrganizationOrDefault(). Now ResolveOrgFromFlag returns an error instead of nil. Confirm the error message ("no orgs exist") is acceptable.

Notes

• ResolveOrgFromFlag duplicates the same logic as getOrgForRunLs in ls.go. A follow-up could consolidate ls.go to use the shared utility.
• No new unit tests were added for the shared utilities (ResolveOrgFromFlag, GetUserWorkspaceByNameOrIDErrInOrg). These would benefit from coverage in a follow-up.
• ollama and workspacegroups register the --org flag but do not register tab completion for it (unlike the other commands). This is intentional since they are hidden/stub commands.

Link to Devin session: https://app.devin.ai/sessions/b9480e7c87b747e5b1d681faa65eddcb
Requested by: @theFong

[devin-ai-integration]

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 65 lines in your changes missing coverage. Please review.
✅ Project coverage is 17.63%. Comparing base (88dc335) to head (6420e8a).
⚠️ Report is 26 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/cmd/util/util.go	0.00%	25 Missing ⚠️
pkg/cmd/open/open.go	0.00%	15 Missing ⚠️
pkg/cmd/shell/shell.go	0.00%	15 Missing ⚠️
pkg/cmd/util/externalnode.go	0.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #341      +/-   ##
==========================================
+ Coverage   14.77%   17.63%   +2.85%     
==========================================
  Files         127      140      +13     
  Lines       16977    18528    +1551     
==========================================
+ Hits         2508     3267     +759     
- Misses      14182    14902     +720     
- Partials      287      359      +72     

Flag	Coverage Δ
Linux	17.63% <0.00%> (+2.85%)	⬆️

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