feat: add static hero section content to homepage

pkg/nebula/models/marketing.go

@@ -0,0 +1,28 @@
+package models
+
+type Button struct {
+	Text string
+	Href string
+}
+
+type Image struct {
+	Src    string
+	Width  string
+	Height string
+}
+
+type Stat struct {
+	Value string
+	Label string
+}
+
+type Hero struct {
+	TitleFirst      string
+	TitleEmphasis   string
+	TitleSecond     string
+	Subtitle        string
+	PrimaryButton   *Button
+	SecondaryButton *Button
+	Image           *Image
+	Stats           []*Stat
+}