Add JDBC database provider for JVM

gradle/libs.versions.toml

@@ -16,6 +16,9 @@ compiler = "3.2.0-alpha11"
 ktor = "3.3.1"
 slf4j = "2.0.17"
 sqlite-jdbc = "3.50.3.0"
+h2 = "2.4.240"
+postgresql = "42.7.8"
+testcontainers = "1.20.6"
 
 [libraries]
 clikt = { module = "com.github.ajalt.clikt:clikt", version.ref = "clikt" }
@@ -45,6 +48,10 @@ ktor-client-websockets = { module = "io.ktor:ktor-client-websockets", version.re
 ktor-network = { module = "io.ktor:ktor-network", version.ref = "ktor" }
 slf4j-nop = { module = "org.slf4j:slf4j-nop", version.ref = "slf4j" }
 sqlite-jdbc = { module = "org.xerial:sqlite-jdbc", version.ref = "sqlite-jdbc" }
+h2 = { module = "com.h2database:h2", version.ref = "h2" }
+postgresql = { module = "org.postgresql:postgresql", version.ref = "postgresql" }
+testcontainers = { module = "org.testcontainers:testcontainers", version.ref = "testcontainers" }
+testcontainers-postgresql = { module = "org.testcontainers:postgresql", version.ref = "testcontainers" }
 
 [plugins]
 androidLibrary = { id = "com.android.library", version.ref = "agp" }