feat: Posts page impl and associated routes

Implemented a new 'Posts' page which has been added to the main navigation. This includes:
- Adding the 'posts.html' template with basic HTML and related CSS/JS
- Updating the 'componentNavbar.html' template to include a link to the new Posts page
- Writing the 'GetPostsPage' function in 'api/page.go' to handle requests for the Posts page
- Modifying the 'home.html' template to provide a link towards the Posts Page
- Adding an associated route in 'api/page.go'.

api/pagePosts.go

@@ -0,0 +1,14 @@
+package api
+
+import (
+	"html/template"
+	"net/http"
+)
+
+func GetPostsPage(w http.ResponseWriter, _ *http.Request) {
+	navbarTmpl, _ := Container.GetPageUseCase.GetPage("componentNavbar", nil)
+	postsTmpl, _ := Container.GetPageUseCase.GetPage("posts", map[string]interface{}{
+		"Navbar": template.HTML(navbarTmpl),
+	})
+	_, _ = w.Write(postsTmpl)
+}