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/log4j2.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5level %logger{36} - %msg%n"/>
+        </Console>
+        
+        <RollingFile name="FileAppender" fileName="logs/mediamanager.log"
+                     filePattern="logs/mediamanager-%d{yyyy-MM-dd}-%i.log">
+            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5level %logger{36} - %msg%n"/>
+            <Policies>
+                <TimeBasedTriggeringPolicy interval="1"/>
+                <SizeBasedTriggeringPolicy size="10MB"/>
+            </Policies>
+            <DefaultRolloverStrategy max="10"/>
+        </RollingFile>
+    </Appenders>
+    
+    <Loggers>
+        <Logger name="com.mediamanager" level="debug" additivity="false">
+            <AppenderRef ref="Console"/>
+            <AppenderRef ref="FileAppender"/>
+        </Logger>
+        
+        <Logger name="org.hibernate" level="info" additivity="false">
+            <AppenderRef ref="Console"/>
+            <AppenderRef ref="FileAppender"/>
+        </Logger>
+        
+        <Root level="info">
+            <AppenderRef ref="Console"/>
+            <AppenderRef ref="FileAppender"/>
+        </Root>
+    </Loggers>
+</Configuration>