feat(agents): integrate isolated Pi conversion foundation from PR 3022

Carry the canonical IR, Pi emitter and source-schema doctor from https://github.com/affaan-m/ECC/pull/3022. Cursor and OpenCode emitters remain with the open source PR pending capability fixes.

Co-authored-by: alizahidraja <alizahidrajaa@gmail.com>

package.json

@@ -109,6 +109,7 @@
     "plugins/ecc/",
     "rules/",
     "schemas/",
+    "scripts/agent-convert.js",
     "scripts/catalog.js",
     "scripts/ci/scan-supply-chain-iocs.js",
     "scripts/ci/supply-chain-advisory-sources.js",