Alerting: Add notification policy flow chart (#49405)

* setup component add images

* add name to theme

* add root route info box

* remove unsused

* styling

packages/grafana-data/src/themes/createTheme.ts

@@ -23,7 +23,6 @@ export interface NewThemeOptions {
 /** @internal */
 export function createTheme(options: NewThemeOptions = {}): GrafanaTheme2 {
   const {
-    name = 'Dark',
     colors: colorsInput = {},
     spacing: spacingInput = {},
     shape: shapeInput = {},
@@ -41,7 +40,7 @@ export function createTheme(options: NewThemeOptions = {}): GrafanaTheme2 {
   const visualization = createVisualizationColors(colors);
 
   const theme = {
-    name,
+    name: colors.mode === 'dark' ? 'Dark' : 'Light',
     isDark: colors.mode === 'dark',
     isLight: colors.mode === 'light',
     colors,