feat: implement scalable multi-brand architecture

Architecture:
- Each brand has its own pages folder with Angular components
- brand-routes.ts defines routes for default brand (dexar)
- brand-routes.novo.ts defines routes for novo brand
- angular.json fileReplacements swaps brand-routes.ts based on build config

Structure:
- src/app/brands/dexar/pages/ - Dexar HTML templates
- src/app/brands/novo/pages/ - Novo components (TS + HTML)
- src/app/brands/brand-routes.ts - Default (dexar) routes
- src/app/brands/brand-routes.novo.ts - Novo routes

This approach allows:
- Adding 3rd, 4th, 5th brands by creating new folders
- Each brand has completely separate templates
- No @if conditionals needed in templates
- Build-time separation (zero runtime overhead)

angular.json

@@ -88,6 +88,10 @@
                 {
                   "replace": "src/environments/environment.ts",
                   "with": "src/environments/environment.novo.ts"
+                },
+                {
+                  "replace": "src/app/brands/brand-routes.ts",
+                  "with": "src/app/brands/brand-routes.novo.ts"
                 }
               ],
               "index": "src/index.novo.html",
@@ -105,6 +109,10 @@
                 {
                   "replace": "src/environments/environment.ts",
                   "with": "src/environments/environment.novo.production.ts"
+                },
+                {
+                  "replace": "src/app/brands/brand-routes.ts",
+                  "with": "src/app/brands/brand-routes.novo.ts"
                 }
               ],
               "index": "src/index.novo.html",