Column casting, more column types and CI goodies

[alfonsorr]

• Added casting typeclass
• Added Float, double, and long columns
• Added scalafmt file and plugin, also added to the CI
• Added coursier cache to the CI to cache between runs
• Gitignore with metals /vs code ignores

Change the scalafmt if something is not ok

[alfonsorr]

Added syntax for joins and group by