feat: implement database

[SHACRAM]

Description

Create database connection.
Add migrations files and create table user and station.
Create models User and Station.

Related Issue

Closes #4

Type of Change

• feat
• fix
• docs
• refactor
• chore
• test
• ci

How Has This Been Tested?

For migrations : Flyway
https://documentation.red-gate.com/fd/migrations-271585107.html

Checklist

• I have followed the Conventional Commits naming rules
• I have added tests where applicable

[Copilot]

Pull Request Overview

This PR sets up database schema and JPA entity models for a bike-sharing (vlib) application. It introduces database migrations using Flyway, creates two core entity models (User and Station), and adds PostgreSQL support.

• Database schema creation with Flyway migration for users and station tables
• JPA entity models (User and Station) with corresponding Status enum
• PostgreSQL and Flyway dependencies added to the project

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
V1__Create_tables_User_and_Station.sql	Flyway migration script creating users and station tables with appropriate columns and constraints
application.properties	Removed application name property (likely moved to a gitignored file)
User.java	JPA entity representing users with email, password, status, and timestamp fields
Status.java	Enum defining user roles (User and Admin)
Station.java	JPA entity representing bike stations with location and metadata
pom.xml	Added PostgreSQL driver and Flyway dependencies for database migration support
.gitignore	Added pattern to exclude .properties files from version control

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