feat: implement customer profile management and business application features

- Added customer profile controller with endpoints for retrieving, updating, and deactivating user profiles.
- Introduced address model and routes for managing user addresses.
- Created business application model and service for handling business applications, including approval and rejection processes.
- Developed business contact and credit account models to support business customer functionalities.
- Implemented settlement term model for managing payment terms.
- Added email templates for business application notifications (approved, rejected, received, and status changes).
- Enhanced validation schemas for customer and business inputs to ensure data integrity.
- Created unit tests for business application service and validation schemas to ensure functionality and correctness.
- Added migration scripts to set up new database tables and columns for customer and business features.

app/models/user/businessApplication.model.js

@@ -0,0 +1,9 @@
+module.exports = (sequelize, DataTypes) => {
+  const Model = sequelize.define("BusinessApplication", {
+    id: { type: DataTypes.STRING, primaryKey: true }, user_id: { type: DataTypes.STRING, allowNull: false },
+    business_name: { type: DataTypes.STRING(180), allowNull: false }, legal_name: { type: DataTypes.STRING(180), allowNull: false }, registration_number: { type: DataTypes.STRING(100), allowNull: false }, tax_number: DataTypes.STRING(100), business_type: { type: DataTypes.STRING(80), allowNull: false }, contact_email: { type: DataTypes.STRING, allowNull: false }, contact_phone: { type: DataTypes.STRING(30), allowNull: false }, website: DataTypes.STRING,
+    status: { type: DataTypes.ENUM("PENDING", "UNDER_REVIEW", "APPROVED", "REJECTED", "CANCELLED"), allowNull: false, defaultValue: "PENDING" }, reviewed_by: DataTypes.STRING, reviewed_at: DataTypes.DATE, rejection_reason: DataTypes.STRING(500),
+  }, { tableName: "business_applications", timestamps: true });
+  Model.associate = (models) => { Model.belongsTo(models.User, { foreignKey: "user_id", as: "applicant" }); Model.belongsTo(models.User, { foreignKey: "reviewed_by", as: "reviewer", constraints: false }); };
+  return Model;
+};