docs(*): adding changelog updates

Author: kdinev

CHANGELOG.md

@@ -2,6 +2,20 @@
 
 All notable changes for each version of this project will be documented in this file.
 
+## 17.0.0
+### General
+- `standalone components` support is now official
+    - added `IGX_RADIO_GROUP_DIRECTIVES` for `IgxRadioGroupDirective` and `IgxRadioComponent`
+- `animations` are now imported from `igniteui-angular/animations`/`@infragistics/igniteui-angular/animations`
+- Tree-shaking of the product has been improved
+    - `igniteui-angular-i18n` is now tree-shakeable
+    - `igniteui-angular/animations` is now tree-shakeable
+    - `igniteui-angular` components have improved tree-shaking
+- DisplayDensity token and inputs are deprecated in favor of `--ig-size` theming
+- We're working on reducing the library size
+    - IgxRadioComponent has been reduced in half
+    - IgxSwitchComponent has been reduced in half
+
 ## 16.1.0
 ### New Features
 - `IgxSelect`: