feat: add Prettier with go-template and toml plugins, format all files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

layouts/partials/img.html

@@ -2,15 +2,16 @@
   Renders a Hugo image resource as an optimised WebP <img> with responsive srcset.
 
   Parameters:
-    res     — Hugo image resource (required)
-    widths  — slice of pixel widths to generate, e.g. (slice 600 1200)
-               default: (slice 800 1600)
-    sizes   — value for the <img sizes> attribute
-               default: "100vw"
-    class   — CSS classes applied to <img>
-    alt     — alt text (default "")
-    loading — "lazy" or "eager" (default "lazy")
-*/ -}}
+  res     — Hugo image resource (required)
+  widths  — slice of pixel widths to generate, e.g. (slice 600 1200)
+  default: (slice 800 1600)
+  sizes   — value for the <img sizes> attribute
+  default: "100vw"
+  class   — CSS classes applied to <img>
+  alt     — alt text (default "")
+  loading — "lazy" or "eager" (default "lazy")
+  */
+-}}
 {{- $res     := .res -}}
 {{- $widths  := .widths  | default (slice 800 1600) -}}
 {{- $sizes   := .sizes   | default "100vw" -}}
@@ -35,4 +36,4 @@
   height="{{ $primary.Height }}"
   loading="{{ $loading }}"
   decoding="async"
->
+/>