Initialize MediaManager-Core project with essential setup:

- Added `.gitignore` for common IDE and build artifacts.
- Configured `pom.xml` with dependencies: PostgreSQL, Hibernate, HikariCP, Log4j 2, Jackson, JUnit 5.
- Created `Media` entity with JPA annotations.
- Added `application.properties` for database and IPC configuration.
- Configured Log4j 2 with console and rolling file appenders.
- Provided `README.md` with setup instructions.
- Included `MediaManagerApplication` class as a starting point.

src/main/resources/application.properties

@@ -0,0 +1,23 @@
+# Database Configuration
+db.url=jdbc:postgresql://localhost:5432/mediamanager
+db.username=mediamanager
+db.password=changeme
+db.driver=org.postgresql.Driver
+
+# HikariCP Connection Pool Settings
+db.pool.maximum-pool-size=10
+db.pool.minimum-idle=2
+db.pool.connection-timeout=30000
+db.pool.idle-timeout=600000
+db.pool.max-lifetime=1800000
+
+# Hibernate Settings
+hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
+hibernate.hbm2ddl.auto=update
+hibernate.show_sql=false
+hibernate.format_sql=true
+
+# IPC Configuration
+ipc.pipe.name=mediamanager-pipe
+ipc.pipe.path=/tmp/mediamanager
+ipc.buffer.size=8192