feat: add @script-development/fs-router package

[Goosterhof]

Summary

• New @script-development/fs-router package — type-safe router service factory wrapping vue-router
• Merges the best of kendo and BIO router implementations into a shared package
• CRUD navigation shortcuts, middleware pipeline with unregister, custom RouterView/RouterLink components, generic Meta type for territory-specific route metadata

What's included

• createRouterService<Routes>() factory with full type-safe route name inference
• createCrudRoutes() / createNestedCrudRoutes() / createStandardRouteConfig() route factories
• Custom RouterView (depth-aware key) and RouterLink (modifier-key passthrough)
• Middleware registration (before/after) with unregister support
• Current route computed refs: currentRouteId, currentRouteSlug, currentParentId, currentRouteQuery
• Page detection: onPage, onCreatePage, onEditPage, onOverviewPage, onShowPage
• routeExists, changeRouteQuery, goBack, getUrlForRouteName, install

Quality

• 93 tests, 100% coverage (lines, branches, functions, statements)
• 91.2% mutation score (threshold: 90%)
• publint + attw: all green
• oxlint: 0 issues

Test plan

• npm run build — dual ESM + CJS output
• npx tsc --noEmit — clean typecheck
• npm run test:coverage — 100% coverage
• npm run test:mutation — 91.2% mutation score
• npm run lint:pkg — publint + attw pass
• CI pipeline (8 gates)

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