Add support for SQLite as the bookkeeping storage

[yruslan]

Background

This can be very powerful for keeping the bookkeeping database in local storage and running Pramen form edge nodes.

Feature

Add support for SQLite as the bookkeeping storage.

Example [Optional]

  bookkeeping.enabled = true
  bookkeeping.jdbc {
    driver = "org.sqlite.JDBC"
    url = "jdbc:sqlite:/home/user_a/pramen.sqlite"
  }

Proposed Solution [Optional]

Also, SQLite could be the default database when bookkeeping is not enabled.

  bookkeeping.enabled = true
  # ↑ implies ↓
  bookkeeping.jdbc {
    driver = "org.sqlite.JDBC"
    url = "jdbc:sqlite:pramen.sqlite"
  }