Add Gestión dashboard and update Tela stats

Introduces a new Gestión dashboard page with a stats overview widget for Tela and OrdenProduccion. Updates navigation icons for several Filament resources for better distinction. Adds a relationship between Tela and OrdenProduccion models. Refactors the telas table migration to use integer types for numeric fields instead of strings.

database/migrations/2026_01_08_213226_create_telas_table.php

@@ -22,13 +22,13 @@ return new class extends Migration
 
             $table->foreignId('proveedor_id')->constrained('proveedors')->cascadeOnDelete();
 
-            $table->string('metros_comprados');
-            $table->string('metros_disponibles');
+            $table->integer('metros_comprados');
+            $table->integer('metros_disponibles');
 
             $table->date('fecha_compra');
 
-            $table->string('valor_total');
-            $table->string('costo_por_metro');
+            $table->integer('valor_total');
+            $table->integer('costo_por_metro');
 
             $table->text('observaciones')->nullable();