Extract binder package from citation-evidence (EBIND-WP-0001)

Extracts citation-evidence/src/binder/ into this repo as the standalone
@citation-evidence/evidence-binder package: headless binding service +
in-memory link repo, active-state machine, the SharedContracts §7
rect-registry contract (registry, change pumps, hooks, SVG overlay), and
the target-neutral reference FormRenderer.

- toolchain mirrors sibling extracted repos (pnpm/tsc/vitest/eslint);
  imports rewritten from @shared/@engine aliases to the engine's
  @citation-evidence/engine package specifiers
- dependency boundary (engine + anchor only; no source/work/umbrella)
  enforced via eslint no-restricted-imports
- docs: extraction inventory + contract deltas, ADR-0001 (reference UI
  kept as supported exports), refreshed README/SCOPE/INTENT, populated
  capabilities index
- typecheck + lint green, 37 tests passing

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -0,0 +1,54 @@
+{
+  "name": "@citation-evidence/evidence-binder",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Evidence-to-target binding, active-state coordination, and the visual-guide rect-registry contract for the citation-evidence ecosystem.",
+  "license": "Apache-2.0",
+  "type": "module",
+  "packageManager": "pnpm@9.15.0",
+  "engines": {
+    "node": ">=20.10.0"
+  },
+  "files": [
+    "src",
+    "README.md",
+    "SCOPE.md",
+    "INTENT.md",
+    "LICENSE"
+  ],
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "scripts": {
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "lint": "eslint .",
+    "typecheck": "tsc -b --noEmit"
+  },
+  "dependencies": {
+    "@citation-evidence/engine": "link:../citation-engine"
+  },
+  "peerDependencies": {
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1"
+  },
+  "devDependencies": {
+    "@testing-library/dom": "^10.4.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
+    "@types/node": "^20.14.0",
+    "@types/react": "^18.3.3",
+    "@types/react-dom": "^18.3.0",
+    "@vitejs/plugin-react": "^4.3.1",
+    "eslint": "^9.7.0",
+    "eslint-import-resolver-typescript": "^3.6.3",
+    "eslint-plugin-import": "^2.30.0",
+    "globals": "^15.9.0",
+    "happy-dom": "^20.9.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "typescript": "^5.5.4",
+    "typescript-eslint": "^8.0.0",
+    "vitest": "^2.0.5"
+  }
+}