Add environment listing/updating and full schedules section

[bholmesdev]

Improves coverage on environments and schedules in the oz skill.

Environments — added subsections:

• Listing and Finding Environments (oz environment list, oz environment get, jq filtering)
• Updating Environments (oz environment update flags and example)

Schedules — added dedicated section covering full CRUD:

• Creating schedules (required params, example, common cron patterns)
• Listing/getting schedules
• Updating schedules (cron, prompt, pause/resume)
• Deleting schedules

Co-Authored-By: Warp agent@warp.dev