[#339] Ajout d'une page listant les règles de calcules (#5)

| Numéro du ticket | Titre du ticket |
|------------------|-----------------|
|        #339          |        Ajout d'une page listant les règles de calcules         |

## Description de la PR
[#339] Ajout d'une page listant les règles de calcules

## Modification du .env

## Check list

- [ ] Pas de régression
- [x] TU/TI/TF rédigée
- [x] TU/TI/TF OK
- [ ] CHANGELOG modifié

Reviewed-on: #5
Co-authored-by: tristan <tristan@yuno.malio.fr>
Co-committed-by: tristan <tristan@yuno.malio.fr>

src/Entity/EmployeeContractPeriod.php

@@ -0,0 +1,102 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use App\Repository\EmployeeContractPeriodRepository;
+use DateTimeImmutable;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity(repositoryClass: EmployeeContractPeriodRepository::class)]
+#[ORM\Table(name: 'employee_contract_periods')]
+#[ORM\Index(columns: ['employee_id', 'start_date'], name: 'idx_emp_contract_period_employee_start')]
+#[ORM\Index(columns: ['employee_id', 'end_date'], name: 'idx_emp_contract_period_employee_end')]
+class EmployeeContractPeriod
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private ?int $id = null;
+
+    #[ORM\ManyToOne(targetEntity: Employee::class)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    private ?Employee $employee = null;
+
+    #[ORM\ManyToOne(targetEntity: Contract::class)]
+    #[ORM\JoinColumn(nullable: false)]
+    private ?Contract $contract = null;
+
+    #[ORM\Column(type: 'date_immutable')]
+    private DateTimeImmutable $startDate;
+
+    #[ORM\Column(type: 'date_immutable', nullable: true)]
+    private ?DateTimeImmutable $endDate = null;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private DateTimeImmutable $createdAt;
+
+    public function __construct()
+    {
+        $this->createdAt = new DateTimeImmutable();
+        $this->startDate = new DateTimeImmutable('today');
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getEmployee(): ?Employee
+    {
+        return $this->employee;
+    }
+
+    public function setEmployee(?Employee $employee): self
+    {
+        $this->employee = $employee;
+
+        return $this;
+    }
+
+    public function getContract(): ?Contract
+    {
+        return $this->contract;
+    }
+
+    public function setContract(?Contract $contract): self
+    {
+        $this->contract = $contract;
+
+        return $this;
+    }
+
+    public function getStartDate(): DateTimeImmutable
+    {
+        return $this->startDate;
+    }
+
+    public function setStartDate(DateTimeImmutable $startDate): self
+    {
+        $this->startDate = $startDate;
+
+        return $this;
+    }
+
+    public function getEndDate(): ?DateTimeImmutable
+    {
+        return $this->endDate;
+    }
+
+    public function setEndDate(?DateTimeImmutable $endDate): self
+    {
+        $this->endDate = $endDate;
+
+        return $this;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+}