Initial Development (#1)

This project now contains:
- A generic JVM document library (with Kotlin extensions on the JDBC `Connection` object)
- A Groovy library which adds extension methods to the `Connection` object
- A Scala library, which uses native Scala collections and adds Scala-style extension methods to the `Connection` object
- A Kotlin library which uses `kotlinx.serialization` (no reflection, reified generic types) along with `Connection` extensions

Reviewed-on: #1

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml