feat(integrations): add Zapier app for Mem0

A Zapier Platform CLI app (TypeScript) wrapping the hosted Mem0 v3 REST API:
Add / Search / Get Memories / Delete actions with custom API-key auth.

- Written in TypeScript, compiles to dist/; offline unit tests (mocked z.request)
  plus live E2E; `zapier validate` clean
- Add supports custom_instructions, custom_categories, includes, excludes;
  Wait-for-Completion defaults off (extraction can exceed Zapier's 30s step limit)
- Middleware surfaces non-2xx as errors (no silent empty results)
- Anonymous opt-out telemetry (MEM0_TELEMETRY=false)
- Docs page + docs.json/llms.txt entry, ci-gate wiring, AGENTS.md rows

Split out of #6057 per review (separate PRs per integration).

integrations/zapier-mem0/package.json

@@ -0,0 +1,54 @@
+{
+  "name": "zapier-mem0",
+  "version": "0.1.0",
+  "description": "Zapier integration for Mem0 — the memory layer for AI agents.",
+  "keywords": [
+    "zapier",
+    "mem0",
+    "memory",
+    "ai",
+    "agents"
+  ],
+  "homepage": "https://mem0.ai",
+  "author": {
+    "name": "Mem0",
+    "email": "founders@mem0.ai"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mem0ai/mem0",
+    "directory": "integrations/zapier-mem0"
+  },
+  "license": "MIT",
+  "main": "dist/index.js",
+  "scripts": {
+    "build": "tsc",
+    "test": "jest --testTimeout 180000",
+    "test:unit": "jest test/unit.test.ts"
+  },
+  "engines": {
+    "node": ">=18",
+    "npm": ">=5.6.0"
+  },
+  "files": [
+    "dist"
+  ],
+  "jest": {
+    "testEnvironment": "node",
+    "testMatch": ["**/test/**/*.test.ts"],
+    "transform": {
+      "^.+\\.tsx?$": ["ts-jest", {}]
+    }
+  },
+  "dependencies": {
+    "zapier-platform-core": "19.0.0"
+  },
+  "devDependencies": {
+    "@types/jest": "^29.5.14",
+    "@types/node": "^22.9.0",
+    "jest": "^29.7.0",
+    "ts-jest": "^29.2.5",
+    "typescript": "^5.6.3"
+  },
+  "private": true
+}