Feat/email composer improvements (#23188)

- Move composer to dedicated page
- Add test email option
- Auto saved as draft can be revisited from `objects/messageCampaigns`
later
- Campaign stats component



https://github.com/user-attachments/assets/9e523116-e79b-496d-9c9d-3887e0c9213f



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Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-front/src/modules/advanced-text-editor/components/AdvancedTextEditor.tsx

@@ -9,7 +9,6 @@ import { themeCssVariables } from 'twenty-ui/theme-constants';
 const StyledEditorContainer = styled.div<{
   readonly?: boolean;
   minHeight: number;
-  maxWidth: number;
 }>`
   box-sizing: border-box;
   display: flex;
@@ -88,21 +87,15 @@ type AdvancedTextEditorProps = {
   readonly: boolean | undefined;
   editor: Editor;
   minHeight: number;
-  maxWidth: number;
 };
 
 export const AdvancedTextEditor = ({
   readonly,
   editor,
   minHeight,
-  maxWidth,
 }: AdvancedTextEditorProps) => {
   return (
-    <StyledEditorContainer
-      readonly={readonly}
-      minHeight={minHeight}
-      maxWidth={maxWidth}
-    >
+    <StyledEditorContainer readonly={readonly} minHeight={minHeight}>
       <EditorContent className="editor-content" editor={editor} />
       <ImageBubbleMenu editor={editor} />
       <TextBubbleMenu editor={editor} />