chore(publish): publish renderer/schema packages and bump versions for --sdui support

[roblevintennis]

Context

The --sdui flag added to ag init (#423 / PR #431) scaffolds a working SDUI app but requires several packages to be published to npm before the renderer install step works end-to-end.

Packages that need to be published

• @agnosticui/schema (v2/schema/) — AgNode schema and types
• @agnosticui/render-react (v2/renderers/react/) — React renderer
• @agnosticui/render-vue (v2/renderers/vue/) — Vue renderer
• @agnosticui/render-lit (v2/renderers/lit/) — Lit renderer

Version bumps needed

• agnosticui-core — bump version (new tarball) and publish to npm
• agnosticui-cli — bump version (added --sdui flag) and publish to npm

Acceptance criteria

• All four renderer/schema packages published to npm under @agnosticui/ scope
• agnosticui-core published with latest changes
• agnosticui-cli published with --sdui flag included
• npx agnosticui-cli init -f react --sdui works fully end-to-end in a fresh Vite project
• Same verified for --framework vue and --framework lit

Notes

Each renderer's package.json currently uses "@agnosticui/schema": "file:../../schema" as a dependency — this will need to be updated to a real npm version before publishing. The internal agnosticui-core peer dependency reference in the renderers will also need to resolve correctly from npm.

[roblevintennis]

Pre-publish packaging checklist

Before publishing, three packaging gaps need to be addressed:

1. Add files field to each renderer package.json

None of the three renderers have a files field or .npmignore. Without it, npm publish ships everything — src/, test files, tsconfig.json, node_modules/, etc. Add to each:

"files": ["dist", "README.md"]

2. Write minimal READMEs for the three renderers

The schema package has a README; the renderers have none. npm pages would be blank. Each needs at minimum: install command, peer deps, basic usage snippet.

3. Tighten the agnosticui-core peer dep floor

PR #453 (merged) added the Props interfaces that make SDUI codegen work correctly. The renderers should declare:

"agnosticui-core": ">=2.0.0-alpha.25"

alpha.25 is the first version with CopyButton, EmptyState, Image, ProgressRing, SkeletonLoader, and Timeline codegen-eligible. A looser floor (e.g. >=2.0.0-alpha) would allow consumers to pull an older core and silently get fewer components in the schema.

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The underlying code is solid — all tests pass (43 schema + 12/12/14 renderer tests), TypeScript compiles clean across all three renderers. The above is purely packaging hygiene before the alpha publish.

[roblevintennis]

Reopening — PR #456 completed the pre-publish packaging prerequisites (files field, peer dep floor, READMEs) but the actual npm publish has not happened yet. The packages still need to be published to npm before this issue can be closed.