M7.2: share the loop's parts

Shared parts, not a shared scheduler (agreed): nisse-review will have its
own small scheduler; a common one waits until two exist to compare.

- nisse_core.loop.driver: the driver run, moved; the agent names its
  waiting tools per run (nisse-dev's are WAITING_TOOLS), and execution
  goes to any Executor (ToolOutcome moves with it).
- nisse_core.loop.tools: the tool helper and the tools any agent offers
  (notes, memory, memory_done, ask_expert); nisse_core.loop.expert.
- nisse_core.knowledge.handlers: Knowledge, the vault and memory as
  control tools, the index and prompt text, out of LoopAgent.
- nisse_core.config: file reading, references, people, tuning sections of
  the agent's own, LLM numbers, the vault.
- New core tests: a driver run with a non-workspace executor and the
  agent's own waiting set; Knowledge alone; the shared config pieces.

Docs: the Development Plan marks M7.2 done; Architecture Part L and the
nisse-core README name the new parts.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J5Utyfzw7gF7UhjRDEtjTk

docs/Development-Plan.md

@@ -582,9 +582,23 @@ says so).
 architecture section (`models`, `log`, `state`, `knowledge`, `conversation`,
 `execution`, `authority`), as a pure move ahead of M7.2.
 
-**M7.2 Share the loop.** *Needs discussion.* What of `nisse_dev.loop` and
-`config` is any agent's moves to `nisse-core`, shaped by what `nisse-review`
-needs; `nisse-dev` runs on it unchanged.
+**M7.2 Share the loop.** *Done.* Shared parts, not a shared scheduler: each
+agent keeps its own (nisse-review's is small and different), and a common one
+waits until two exist to compare. Moved, unchanged in behaviour:
+
+- `nisse_core.loop.driver`: the driver run. The agent names its waiting tools
+  per run, and execution goes to any `Executor` (nisse-dev's `Workspace` is
+  one).
+- `nisse_core.loop.tools`: the control-tool helper and the tools any agent
+  offers (notes, memory, `memory_done`, `ask_expert`); `nisse_core.loop.expert`.
+- `nisse_core.knowledge.handlers`: `Knowledge`, the vault and memory as
+  control tools, the memory index and the prompt text; the agent frames the
+  memory pass.
+- `nisse_core.config`: reading the file, references, people, tuning sections
+  of the agent's own, the LLM's numbers, the vault.
+- Stays in `nisse-dev` (decided with the operator): the scheduler, items,
+  milestones, preflight, the go-ahead reader, its fast-path rules, the
+  classifier (until `nisse-ops`), delegation, profiles and projects.
 
 **M7.3 `nisse-review`'s first slice.** *Needs discussion.* The duty and a work item
 per ready PR (R1), read-only tools bound to the item's repository (R3), a first