feat(smartstate): Add middleware, computed, batching, selector memoization, AbortSignal support, and Web Component Context Protocol provider

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2026-02-27 11:40:07 +00:00
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# Changelog
## 2026-02-27 - 2.1.0 - feat(smartstate)
Add middleware, computed, batching, selector memoization, AbortSignal support, and Web Component Context Protocol provider
- Introduce StatePart middleware API (addMiddleware) — middleware runs sequentially before validation/persistence and can transform or reject a state change.
- Add computed derived observables: standalone computed(sources, fn) and Smartstate.computed to derive values from multiple state parts (lazy subscription).
- Add batching support via Smartstate.batch(fn), isBatching flag, and deferred notifications to batch multiple updates and flush only at the outermost level.
- Enhance select() with selector memoization (WeakMap cache and shareReplay) and optional AbortSignal support (auto-unsubscribe).
- Extend waitUntilPresent() to accept timeout and AbortSignal options and maintain backward-compatible numeric timeout argument.
- Add attachContextProvider(element, options) to bridge state parts to Web Component Context Protocol (context-request events) with subscribe/unsubscribe handling.
- Update StatePart.setState to run middleware, persist processed state atomically, and defer notifications to batching when applicable.
- Tests and README updated to document new features, behaviors, and examples.
## 2026-02-27 - 2.0.31 - fix(deps)
bump devDependencies and fix README license path