Bug fixes and cleanup

[MrTJP]

• Add package-info.java to all package directories and enforce everything being Nonnull by default.
• Clean entire code-base to abide by new nullability rules. Mark all nullable fields as @Nullable
• Fixed a few faces in Frame model having 5 vertices by removing duplicates. CCL's object loader will try to quadulate non quads, leading to quads that have duplicate vests. This causes normal calculation to not work. Without normals, re-tracing the frame model gives a crash.
• Dropped usage of deprecated methods in CBM
• Add a visual grid overlay effect when in edit mode in the IC Workbench to better let the user know that compilation is required.
• Create and publish a separate API jar. Instructions also added in README. (Closes Create a separate artifact for the API #1512)
• Add setting in IC Workbench to automatically run compilation when the design changes. This feature is available until the design reaches a configurable number of tiles (default 20)
• Minor logging cleanup