`spike policy list` should have concise output

[v0lkan]

spike secret list and spike policy list have inconsistent output behavior. The secret list command shows only paths (concise), while the policy list command dumps entire policy objects (verbose).

For consistency and usability, spike policy list should show only policy names and IDs.

Current Behavior:

spike secret list - Concise output:

secrets/db/creds
secrets/app/config
secrets/cache/redis

spike policy list - Verbose output (dumps entire policy objects):

- name: "database-policy"
  spiffeidPattern: "^spiffe://example\\.org/database$"
  pathPattern: "^secrets/database/production$"
  permissions: [read]
- name: "web-service-policy"
  spiffeidPattern: "^spiffe://example\\.org/web-service$"
  pathPattern: "^secrets/web-service/config$"
  permissions: [read, write]
...

Expected Behavior

spike policy list should show only names and IDs:

ID                                    NAME
550e8400-e29b-41d4-a716-446655440000  database-policy
6ba7b810-9dad-11d1-80b4-00c04fd430c8  web-service-policy

Users can then use spike policy get to retrieve full policy details when needed.

Rationale

1. Consistency: Both list commands should follow the same pattern (concise summary)
2. Usability: Policy lists can grow large; dumping full objects makes output hard to scan
3. Separation of concerns: List operations should enumerate resources; get operations should show details
4. CLI conventions: Standard practice is for list to show identifiers and get/describe to show details

[yagmurcicekdagi]

/assign

[v0lkan]

All yours. Have fun.