Make the @logicsrc packages publishable (#134)

@logicsrc/opencontext could not be installed from npm. Three defects, each of
which alone breaks a published tarball:

1. opencontext depended on "@logicsrc/validators": "file:../validators". A
   file: specifier is unresolvable for anyone installing from the registry, so
   `npm install @logicsrc/opencontext` failed outright.

2. validators imported all 50 schemas by relative path across the repository
   ("../../schemas/schemas/*.json"). That resolves inside the monorepo and
   escapes the package once published, so an installed validators could not
   load a single schema. Now imported through @logicsrc/schemas package
   exports, with a real dependency declared.

3. Three of those schemas — repo, pull-request, openprd-prd — had no entry in
   the schemas exports map, so they were unreachable by package specifier.
   Added; the map is now sorted so it stays readable as it grows.

validators also gained files/publishConfig/license so it publishes the same way
its siblings do.

Verified the way a stranger would: npm pack all three, install the tarballs
into a clean project outside the monorepo, and run the installed binary —
version, init, validate --strict (which exercises schema loading through the
package exports), and resolve --explain all succeed. Full workspace suite green.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

packages/opencontext/package.json

@@ -43,7 +43,7 @@
   },
   "dependencies": {
     "@libsql/client": "^0.17.4",
-    "@logicsrc/validators": "file:../validators",
+    "@logicsrc/validators": "^0.1.0",
     "commander": "^14.0.2",
     "yaml": "^2.8.1"
   },