docs: general docs adjustments (#6258)

Adjustments:

- mention ui5wc MigrationGuide
- order of breaking changes
- ThemingParameters in "Public Utils"
- 1.x support

Author: Lukas742

README.md

@@ -76,6 +76,10 @@ To consume `ui5-webcomponents-react`, you need to install the npm modules and re
 npm install @ui5/webcomponents-react @ui5/webcomponents @ui5/webcomponents-fiori
 ```
 
+## Ongoing Support for Version 1.x
+
+We will continue to support version 1.x until the end of the year, focusing on bug fixes to ensure continuity for our existing users.
+
 <!-- *********************************************************************** -->
 
 ## Getting Started

docs/MigrationGuide.mdx

@@ -17,6 +17,13 @@ or the [changelog](?path=/docs/change-log--page)._
 
 <TableOfContent headingSelector="h2, h3" />
 
+## UI5 Web Components Migration Guide
+
+The breaking changes listed here only affect our codebase. Changes related solely to the underlying web component are **not** tracked here.
+For a complete list of breaking changes in UI5 Web Components, please refer to their [Migration Guide](https://sap.github.io/ui5-webcomponents/docs/migration-guides/to-version-2/).
+
+_**Note:** Our `codemod` covers changes from ui5-webcomponents as well._
+
 ## Codemod
 
 To make the migration to UI5 Web Components (for React) v2 easier,
@@ -1188,17 +1195,17 @@ The prop `titleText` is now required.
 
 For better alignment with the UI5 Web Components the `active` prop has been renamed to `interactive`.
 
-### ThemeProvider
-
-The prop `withoutModalsProvider` has been removed.
-In order to provide a place for the `Modals` helper to mount the popovers, you have to render the new `Modals` component in your application tree.
-
 ### SelectDialog
 
 - `mode` has been renamed to `selectionMode`
 - `onAfterClose` has been renamed to `onClose`
 - `onAfterOpen` has been renamed to `onOpen`
 
+### ThemeProvider
+
+The prop `withoutModalsProvider` has been removed.
+In order to provide a place for the `Modals` helper to mount the popovers, you have to render the new `Modals` component in your application tree.
+
 ### VariantManagement
 
 The `portalContainer` prop has been removed as it is no longer needed.

docs/Welcome.mdx

@@ -29,6 +29,10 @@ In addition to that, UI5 Web Components for React is providing complex component
 - [Node.js](https://nodejs.org/) (**LTS version**)
 - If you're using [TypeScript](https://www.typescriptlang.org/) we recommend version **4.7** or later.
 
+## Ongoing Support for Version 1.x
+
+We will continue to support version 1.x until the end of the year, focusing on bug fixes to ensure continuity for our existing users.
+
 ## Getting Started
 
 ### Tutorial

docs/knowledge-base/Public-Utils.mdx

@@ -75,9 +75,22 @@ The `Device` allows you to detect information about the environment where your a
 
 <Source code={`import { ThemingParameters } from '@ui5/webcomponents-react-base';`} />
 
-By using our `ThemingParameters`, you can define the look and feel of your application without the need to hard-code any
-colors. You can e.g. set `ThemingParameters.sapBackgroundColor` as a `background-color` and you'll always get the correct
-background color for your current theme.
+By using the global `--sap...` CSS variables, you can define the look and feel of your application without the need to hard-code any
+colors. The `ThemingParameters` is an JS object containing all available CSS variables mapped to their name.
+
+Example:
+
+```jsx
+<div style={{ background: ThemingParameters.sapBackgroundColor }} />
+```
+
+Is equivalent to:
+
+```jsx
+<div style={{ background: 'var(--sapBackgroundColor)' }} />
+```
+
+**Note:** We don't recommend excessive use of inline-style!
 
 <ThemeableCSSVars />