Update CHANGELOG and add export presets and icon files

- Expanded CHANGELOG with project scaffolding and core tech details.
- Added export presets configuration for Windows and Linux.
- Introduced placeholder icon.svg for project branding.
- Corrected application resource modification setting in export presets.

export_presets.cfg

@@ -26,7 +26,7 @@ texture_format/s3tc_bptc=true
 texture_format/etc2_astc=false
 binary_format/architecture="x86_64"
 codesign/enable=false
-application/modify_resources=true
+application/modify_resources=false
 application/icon=""
 application/console_wrapper_icon=""
 application/icon_interpolation=4