chore: extract aggregate-library into its own repository

aggregate-library now lives as a standalone top-level repo at
hyperpolymath/aggregate-library (history preserved via git subtree split).
Remove the vendored subdirectory and fix internal references.

- Remove aggregate-library/ (136 files; full history extracted to the new repo)
- deno.json: drop the ./aggregate-library workspace member
- .hypatia-baseline.json: drop the aggregate-library/** baseline entry
- .machine_readable/6a2/STATE.a2ml: drop the stale TS-exemption path

Cross-ecosystem integration references (affinescript-ecosystem,
rescript-ecosystem) are left intact — they point to the library, which
remains available as the standalone repo.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.hypatia-baseline.json

@@ -31,14 +31,6 @@
     "note": "cadre-tea-router is a ReScript TEA router; pending migration to AffineScript.",
     "tracking_issue": "https://github.com/hyperpolymath/developer-ecosystem/issues/pending"
   },
-  {
-    "severity": "high",
-    "rule_module": "cicd_rules",
-    "type": "banned_language_file",
-    "file_pattern": "aggregate-library/**",
-    "note": "aggregate-library contains pre-migration ReScript source; migration tracked in estate plan.",
-    "tracking_issue": "https://github.com/hyperpolymath/developer-ecosystem/issues/pending"
-  },
   {
     "severity": "high",
     "rule_module": "cicd_rules",

.machine_readable/6a2/STATE.a2ml

@@ -36,7 +36,6 @@ legacy-language = "ReScript (existing .res files, no new .res files permitted)"
 banned = ["TypeScript", "Python", "Go", "Node.js", "npm", "Bun"]
 approved-ts-exemptions = [
   "affinescript-ecosystem/affinescript-deno-test/**",
-  "aggregate-library/src/test-runner.ts",
   "rescript-ecosystem/packages/core/runtime-tools/bin/rrt.ts"
 ]