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>

marketplace.json

@@ -0,0 +1,19 @@
+{
+  "$schema": "https://agent-plugins.org/schemas/1.0.0/marketplace.schema.json",
+  "name": "redsen",
+  "owner": {
+    "name": "Redsen",
+    "url": "https://github.com/redsentech"
+  },
+  "metadata": {
+    "description": "Redsen agent tooling for GitHub Copilot CLI and VS Code Copilot.",
+    "version": "0.1.0"
+  },
+  "plugins": [
+    {
+      "name": "redsen-lean-harness",
+      "source": ".",
+      "description": "Imperative, token-lean, self-documenting agent harness with dynamic parallel worktree lanes."
+    }
+  ]
+}