Add SSE primitive and transform utilities

.changeset/utils-add-string-transforms.md

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+---
+"@solid-primitives/utils": minor
+---
+
+Add string transform utilities: `json`, `ndjson`, `lines`, `number`, `safe`, `pipe`.
+
+These are `(string) => T` transform functions useful as the `transform` option for SSE, WebSocket, and similar streaming primitives.

packages/sse/CHANGELOG.md

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+# @solid-primitives/sse
+
+## 0.0.100
+
+### Initial release
+
+- `makeSSE` — base non-reactive primitive wrapping the browser `EventSource` API
+- `createSSE` — reactive primitive with signals for `data`, `error`, and `readyState`, reactive URL support, SSR safety, and configurable app-level reconnection

packages/sse/LICENSE

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+MIT License
+
+Copyright (c) 2021 Solid Primitives Working Group
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.