fix: define component Props type instead of typecasting Astro.props

This surfaces some type errors in props being passed to some components,
particularly in the way Features passes the classes props.

src/components/widgets/Testimonials.astro

@@ -3,7 +3,7 @@ import Headline from '~/components/ui/Headline.astro';
 import WidgetWrapper from '~/components/ui/WidgetWrapper.astro';
 import Button from '~/components/ui/Button.astro';
 import Image from '~/components/common/Image.astro';
-import type { Testimonials } from '~/types';
+import type { Testimonials as Props } from '~/types';
 
 
 const {
@@ -17,7 +17,7 @@ const {
   isDark = false,
   classes = {},
   bg = await Astro.slots.render('bg'),
-} = Astro.props as Testimonials;
+} = Astro.props;
 ---
 
 <WidgetWrapper id={id} isDark={isDark} containerClass={`max-w-6xl mx-auto ${classes?.container ?? ''}`} bg={bg}>