Fix domain-namespaced paths and add pipeline agents

[jonathonbyrdziak]

Summary

• Standardized all file paths to domain-namespaced structure across agent configs
• Added new agents: forecaster, goal-setter, observation-curator, prompt-engineer, thinker-worker
• Renamed sulla agent to sulla-desktop with updated soul prompt
• Added seed goals.md to conversational agents for onboarding bootstrap
• Removed stale tool references and duplicate heartbeat prompt from dreaming-protocol
• Net change: ~565 lines added, ~170 removed across 24 files

Test plan

• Verify new pipeline agents (forecaster, goal-setter, thinker-worker) load correctly
• Test observation-curator expands observe skills based on goals
• Confirm sulla-desktop agent works with renamed identity files
• Validate domain-namespaced paths resolve correctly in all agent configs

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