This release introduces support for custom kernels, allowing users to replace
the default game runtime for their projects. The editor now supports installing
and selecting custom kernels. Added new syntax to support more flexible actor
control. It also includes many other improvements and bug fixes to the runtime,
compiler, and usability. A new "Scroll Shooting" kernel and a starter kit which
takes use of it were also added. Added new tutorials chapters and content. There
are also other updates to the examples and documents.

v1.5

* Runtime
  * Optimized relative moving of actor
  * Improved stability of extension compatibility detection
  * Improved the `DBGINFO(...)` statement
  * Fixed a re-entering issue of the text mode
* Syntax
  * Added `=START PROJECTILE(...) ON ACTOR(...)` to launch a projectile at an actor's position but with its own initial angle
  * Changed the default value of the parameter `full` in `DBGINFO(...)` from `FALSE` to `TRUE`
* Compiler and Asset Pipeline
  * **Added support for custom kernel**
  * **Added compilation of `=START PROJECTILE(...) ON ACTOR(...)`**
  * Fixed a compiling bug when a unary operator `NOT` or `BNOT` comes after other operators
  * Fixed an argument popping issue of the `SEND_SGB_PACKET` and `SET_SGB_BORDER` native functions
  * Fixed a loading bug of scene layers with only a map layer enabled
* Editor
  * **Added installation of custom kernels**
  * **Added selection of custom kernels**
  * **Added a project option to enable run-on-open**
  * Added a menu item to edit a project's property from the home screen directly
  * **Added menu entries to take screen shots and recordings**
  * Added external events to transfer keyboard and text input from JavaScript to WebAssembly
  * Added tooltip items to show actor routines in the scene editor
  * Optimized the structure of the project menu
  * Optimized the shortcut keys
  * Improved UX of actor anchor modification
  * Fixed an SGB palette initialization issue when create a new project
  * Fixed a kernel ejection issue
  * Fixed a potential locale issue
  * Fixed a project reloading issue if there are work queue tasks
* Document, Examples, Starter Kits, Tutorials and Help
  * Added new tutorials chapters and content
  * **Added a new Scroll Shooting kernel**
  * **Added a new Scroll Shooting starter kit**
  * Added documents for custom kernel
  * Added new song "Phenomenon" to the music library
  * Optimized the README.gbb project
  * Fixed stack popping issues of the starter kits when switched scene