docs: trim human-led emphasis to the agentic-AI framing contexts only

Organ READMEs state role/abstraction; the human-led voice stays where
the text explicitly pitches the agentic-AI system (ORGANISM.md
definition, PyAutoScientist docs landing page).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: 2 people

README.md

@@ -5,9 +5,8 @@ gets done: it classifies incoming tasks, plans them, and routes them to
 specialist agents, delegating execution to the other organs. It holds no
 state, runs no health checks, and never releases anything itself.
 
-The organism — an agentic AI ecosystem for human-led, natural-language
-software development — is described once in [ORGANISM.md](ORGANISM.md). The
-short version:
+The organism is described once in [ORGANISM.md](ORGANISM.md). The short
+version:
 
 | Organ | Repo | Job |
 |-------|------|-----|
@@ -32,5 +31,5 @@ bash bin/install.sh          # symlink every organ's skills into ~/.claude
 Runs straight from its checkout — no pip install. Agent contracts and the
 organ boundary are in [AGENTS.md](AGENTS.md); how much a run may do without
 a human is the autonomy contract, [AUTONOMY.md](AUTONOMY.md). The full
-organism documentation — including how to fork it and lead your own — is at
+organism documentation — including how to fork and run your own — is at
 <https://pyautoscientist.readthedocs.io> (source: `docs/`).