Add React Router plugin performance optimizations

.changeset/bright-routes-run.md

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+---
+'rsbuild-plugin-react-router': patch
+---
+
+Improve route analysis and route chunking performance for larger applications, with benchmark tooling to track build overhead.

.changeset/coherent-dev-generations.md

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+---
+'rsbuild-plugin-react-router': minor
+---
+
+Keep development SSR requests on the last successfully evaluated atomic set of
+React Router server entries and their paired web manifests, and expose
+`loadReactRouterServerBuild` so custom servers use the same last-good pair.
+Expose `resolveReactRouterServerBuild` to normalize ESM and CommonJS production
+server modules through the same validated build boundary.
+Preserve `serverBundles` through config normalization and publish every
+configured bundle atomically with its exact filtered manifest.
+This does not snapshot deferred server chunks, make emitted client assets
+atomic, or delay Rsbuild's WebSocket success notification.

.changeset/lazy-entry-hydration.md

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+---
+'rsbuild-plugin-react-router': patch
+---
+
+Keep React Router hydration entries compatible with Rsbuild lazy compilation when `entries: true` is enabled.

.changeset/quiet-topology-order.md

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+---
+'rsbuild-plugin-react-router': patch
+---
+
+Preserve route topology declaration order during development so reordering route
+entries is detected as a topology change.

.changeset/sharp-routes-heal.md

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+---
+'rsbuild-plugin-react-router': patch
+---
+
+Harden route module transforms and development route watching so source maps,
+server/client-only modules, and route topology restarts behave consistently.

.changeset/warm-watchers-rest.md

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+---
+'rsbuild-plugin-react-router': patch
+---
+
+Avoid duplicate startup route topology scans and tighten development watcher
+lifecycle handling for route additions and removals.