feat: updated mobile header (#1004)

**Description:**

- Updated mobile header with respect to latest designs 

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Added a new `showText` property to the `MenuSwitcher` component to
control text visibility.
- Added a `textSectionClassName` property to the `AvatarWithText`
component for conditional text section styling.
- Updated the `CommandDialog` and `DialogContent` components with new
positioning and styling properties.

- **Style Updates**
- Adjusted text size responsiveness in the `Hero` component for various
screen sizes.
- Modified text truncation and input styling in the `Widget` component.
- Changed the width of the `SheetContent` element in `MobileNavigation`
and adjusted footer layout.

- **Documentation**
  - Added instructions for certificate placement in `SIGNING.md`.

- **Refactor**
- Standardized type imports across various components and utilities for
improved type checking.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Signed-off-by: Adithya Krishna <adithya@documenso.com>
Signed-off-by: Adithya Krishna <aadithya794@gmail.com>
Co-authored-by: David Nguyen <davidngu28@gmail.com>

apps/marketing/src/components/(marketing)/widget.tsx

@@ -346,7 +346,7 @@ export const Widget = ({ className, children, ...props }: WidgetProps) => {
                   {signatureText && (
                     <p
                       className={cn(
-                        'text-foreground text-4xl font-semibold [font-family:var(--font-caveat)]',
+                        'text-foreground truncate text-4xl font-semibold [font-family:var(--font-caveat)]',
                       )}
                     >
                       {signatureText}
@@ -360,7 +360,7 @@ export const Widget = ({ className, children, ...props }: WidgetProps) => {
                 >
                   <Input
                     id="signatureText"
-                    className="text-foreground placeholder:text-muted-foreground border-none p-0 text-sm focus-visible:ring-0"
+                    className="text-foreground placeholder:text-muted-foreground truncate border-none p-0 text-sm focus-visible:ring-0"
                     placeholder="Draw or type name here"
                     disabled={isSubmitting}
                     {...register('signatureText', {