Add AgentAd ad schemas as a LogicSRC primitive (#10)

* Add AgentAd ad schemas as a LogicSRC primitive

AgentAd is a disclosed, agent-readable advertising contract for CLI tools
and AI agents. LogicSRC owns the canonical schemas; cl1s.tech is the
reference network built on them.

- packages/schemas: agentad-{ad,placement,ad-request,ad-response,
  impression,click,campaign} schemas (id under schemas.logicsrc.com) +
  ad/placement fixtures, exported from @logicsrc/schemas
- packages/validators: register the 7 agentad kinds, wire fixture
  validation, add tests (disclosure.sponsored must be true)
- docs/agentad.md: the AgentAd spec
- README: list AgentAd under v1 priorities

Validators build clean; all fixtures validate; vitest 4/4 green.

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

* Prepare @logicsrc/schemas for npm publish

Add license, repository, homepage, keywords, publishConfig (public),
and a package README covering both the logicsrc-* core schemas and the
agentad-* family.

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

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

packages/schemas/README.md

@@ -0,0 +1,34 @@
+# @logicsrc/schemas
+
+Canonical JSON Schemas (draft 2020-12) for the LogicSRC open coordination
+standards, maintained by Profullstack, Inc.
+
+Two schema families ship from this package:
+
+- **LogicSRC core** — `logicsrc-*.schema.json`: tasks, agents, runs, events,
+  plugins, connected accounts, email messages, social posts.
+- **AgentAd** — `agentad-*.schema.json`: a disclosed, agent-readable advertising
+  contract for CLI tools and AI agents (ads, placements, requests, responses,
+  impressions, clicks, campaigns). See `docs/agentad.md` in the repo;
+  [cl1s.tech](https://github.com/profullstack/cl1s.tech) is the reference network.
+
+## Install
+
+```bash
+npm install @logicsrc/schemas
+```
+
+## Use
+
+```js
+import adSchema from "@logicsrc/schemas/agentad-ad" with { type: "json" };
+import taskSchema from "@logicsrc/schemas/task" with { type: "json" };
+```
+
+Schema `$id`s resolve under `https://schemas.logicsrc.com/`. Validate with any
+draft 2020-12 validator (e.g. `ajv/dist/2020.js`), or use `@logicsrc/validators`
+from the monorepo.
+
+## License
+
+MIT © Profullstack, Inc.