Refactor package structure and update dependencies

Renamed package structure to `nl.astraeus.tmpl` for consistency and modified the repository name placeholder. Updated Kotlin and library dependencies, removed unused imports, and adjusted Gradle settings for better project clarity.

src/jvmMain/kotlin/nl/astraeus/tmpl/Main.kt

@@ -0,0 +1,39 @@
+package nl.astraeus.tmpl
+
+import com.zaxxer.hikari.HikariConfig
+import nl.astraeus.logger.Logger
+import nl.astraeus.tmpl.db.Database
+
+val log = Logger()
+
+val REPO_NAME = "dummy so the gitea template compiles, please remove"
+
+fun main() {
+  Thread.currentThread().uncaughtExceptionHandler = Thread.UncaughtExceptionHandler { t, e ->
+    log.warn(e) {
+      e.message
+    }
+  }
+
+  Runtime.getRuntime().addShutdownHook(
+    object : Thread() {
+      override fun run() {
+        Database.vacuumDatabase()
+        Database.closeDatabase()
+      }
+    }
+  )
+
+  Class.forName("nl.astraeus.jdbc.Driver")
+  Database.initialize(HikariConfig().apply {
+    driverClassName = "nl.astraeus.jdbc.Driver"
+    jdbcUrl = "jdbc:stat:webServerPort=6001:jdbc:sqlite:data/${REPO_NAME}.db"
+    username = "sa"
+    password = ""
+    maximumPoolSize = 25
+    isAutoCommit = false
+
+    validate()
+  })
+
+}