fix: publish tui runtime dependencies

[fengjikui]

What changed

• Moves @opentui/solid and solid-js from devDependencies to dependencies.
• Adds a package manifest regression test for the published TUI entrypoint runtime imports.
• Updates bun.lock to match the package dependency classification.

Why

The package publishes src/tui.tsx through the ./tui export. That source file uses the OpenTUI Solid JSX runtime, so consumers that install the published package without dev dependencies need @opentui/solid and solid-js available at runtime.

I reproduced the install-path failure with a packed tarball before this change:

pkg=$(npm pack --silent)
tmp=$(mktemp -d)
cp "$pkg" "$tmp/"
(cd "$tmp" && npm init -y >/dev/null && npm install --omit=dev "./$pkg" >/dev/null && bun -e 'import("@prevalentware/opencode-goal-plugin/tui")')

Before the fix, that failed with:

Cannot find module '@opentui/solid/jsx-dev-runtime' from .../node_modules/@prevalentware/opencode-goal-plugin/src/tui.tsx

After the fix, the same clean packed install/import completes with import ok.

Validation

• bun test
• bun run lint
• bun run typecheck
• bun run build
• bun run pack:dry-run
• clean packed install with npm install --omit=dev plus bun -e 'import("@prevalentware/opencode-goal-plugin/tui")'