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

nisse-dev/src/nisse_dev/loop/build.py

@@ -7,24 +7,25 @@ import threading
 from collections.abc import Callable
 from dataclasses import dataclass
 
+from nisse_core.config import ConfigError
 from nisse_core.conversation.matrix import MatrixTransport
 from nisse_core.execution.ssh import SSHHost
 from nisse_core.gitea import GiteaClient
 from nisse_core.knowledge.memory import Memory
 from nisse_core.knowledge.vault import Vault
+from nisse_core.loop.driver import Driver
 from nisse_core.models.catalog import ModelCatalog, select_client
 from nisse_core.models.context import BudgetedClient
 from nisse_core.models.llm import AnthropicPassthroughClient, LiteLLMClient
 from nisse_core.oplog import OpLog
 from nisse_core.state.cancel import Cancel
 from nisse_core.state.worker import SerialWorker
-from nisse_dev.config import AgentConfig, ConfigError
+from nisse_dev.config import AgentConfig
 from nisse_dev.config import Project as ProjectEntry
 from nisse_dev.delegation import Caps
 from nisse_dev.git import GitRepo, HTTPSToken, PushCredential, SSHKey
 from nisse_dev.loop.agent import LoopAgent, Project
 from nisse_dev.loop.classifier import ActionClassifier
-from nisse_dev.loop.driver import Driver
 from nisse_dev.loop.help import Helpers
 from nisse_dev.loop.milestones import Milestones
 from nisse_dev.loop.reader import GoAheadReader