Refactor handlers into separate packages and implement dependency injection.

IDK if this shit is good or even logical, but it works and I can wrap my head around it.

internal/handlers/admin/adminDash.go

@@ -0,0 +1,35 @@
+package handlers_admin
+
+import (
+	"CatsOfMastodonBotGo/internal"
+
+	"github.com/gin-gonic/gin"
+)
+
+type AdminDashboardHandler struct {
+	AppContext *internal.AppContext
+}
+
+func NewAdminDashboardHandler(appContext *internal.AppContext) *AdminDashboardHandler {
+	return &AdminDashboardHandler{
+		AppContext: appContext,
+	}
+}
+
+func (appContext *AdminDashboardHandler) AdminHomePage(c *gin.Context) {
+	c.JSON(200, gin.H{
+		"YouAreOn": "AdminDashboardHomePage",
+	})
+}
+
+func (appContext *AdminDashboardHandler) ApproveMedia(c *gin.Context) {
+	c.JSON(200, gin.H{
+		"YouAreOn": "ApproveMedia",
+	})
+}
+
+func (appContext *AdminDashboardHandler) RejectMedia(c *gin.Context) {
+	c.JSON(200, gin.H{
+		"YouAreOn": "RejectMedia",
+	})
+}