feat: scaffold redsen-lean-harness v0.1.0

Recovered from crashed session (Node OOM). Repo contains full P0-P6
scaffold: plugin.json/marketplace.json, AGENTS.md, ADRs 0001-0006,
lh CLI (init/index/graph/lane/run/memory/host/report/doctor), 10
.github/agents, 12 CLI skills, instructions, context7 mcp.json, and
unit/e2e test suite.

Fixed: run.mjs read --in-tokens/--out-tokens but tests and CLI docs
use --input-tokens/--output-tokens, so telemetry totals were always 0.
Now accepts both forms.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

templates/adr.md

@@ -0,0 +1,23 @@
+# ADR {{ID}}: {{TITLE}}
+
+## Status
+
+Proposed
+
+## Context
+
+What forces, constraints, and facts drive this decision?
+
+## Decision
+
+What option is chosen?
+
+## Consequences
+
+- Positive:
+- Negative:
+- Follow-up:
+
+## Alternatives considered
+
+- Option: why not.