feat: Initialize frontend and backend structure with essential configurations and entities

backend/internal/domain/entities/activity.go

@@ -0,0 +1,7 @@
+package entities
+
+type Activity struct {
+	ID          int
+	Name        string
+	BillingRate float64
+}

backend/internal/domain/entities/company.go

@@ -0,0 +1,6 @@
+package entities
+
+type Company struct {
+	ID   int
+	Name string
+}

backend/internal/domain/entities/customer.go

@@ -0,0 +1,7 @@
+package entities
+
+type Customer struct {
+	ID        int
+	Name      string
+	CompanyID int
+}

backend/internal/domain/entities/project.go

@@ -0,0 +1,7 @@
+package entities
+
+type Project struct {
+	ID         int
+	Name       string
+	CustomerID int
+}

backend/internal/domain/entities/timeentry.go

@@ -0,0 +1,14 @@
+package entities
+
+import "time"
+
+type TimeEntry struct {
+	ID          int
+	UserID      int
+	ProjectID   int
+	ActivityID  int
+	Start       time.Time
+	End         time.Time
+	Description string
+	Billable    int // Percentage (0-100)
+}

backend/internal/domain/entities/user.go

@@ -0,0 +1,10 @@
+package entities
+
+type User struct {
+	ID         int
+	Username   string
+	Password   string
+	Role       string
+	CompanyID  int
+	HourlyRate float64
+}