docs: add 12.3.0.RC blog post

posts/2024/sdk_12_3_0_rc.md

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+---
+title: 'Titanium SDK 12.3.0.RC released'
+date: '2024-01-12'
+category: 'Release'
+author: 'Hans Knöchel'
+teaser: 'Support for Node.js 20, Apple Vision Pro and new Android camera handling'
+---
+
+The next stable version of the Titanium SDK is now is available: <b>12.3.0.RC</b>. Titanium SDK 12.3.0 is a minor release of the SDK, adding new features and fixing existing bugs:
+  * General: Official support for Node.js 18 and 20
+  * General: Module updates (e.g. hyperloop and ti.map)
+  * iOS: Support multi-scene applications (e.g. CarPlay and visionOS)
+  * Android: New camera handling using the official `CameraX` Jetpack library when you use a camera with an overlay. Use `useCameraX: true` to enable the new features (see the documentation for more information).
+
+For a more detailed overview, known issues and closed issues, see the release notes: [Titanium SDK 12.3.0.RC Release Note](https://titaniumsdk.com/guide/Titanium_SDK/Titanium_SDK_Release_Notes/Titanium_SDK_Release_Notes_12.x/Titanium_SDK_12.3.0.RC_Release_Note.html).
+
+## Install
+
+**Follow these steps to get SDK 12.3.0.RC:**
+
+1. Install the CLI with `[sudo] npm i -g titanium alloy`
+2. Run `titanium sdk install 12.3.0.RC`
+3. Set `<sdk-version>12.3.0.RC</sdk-version>` in your `tiapp.xml`
+
+## Report Bugs
+
+If you run into any issues that seem related to the update, please report them on [GitHub](https://github.com/tidev/titanium-sdk/issues).
+
+## How can I support?
+
+If you like our work and want to support, think about a [donation](/donate) or to [contribute](/contribute) with your time and code.