Track KtLint's code styles.

add ConstantConditions.SUGGEST_NULLABLE_ANNOTATIONS to inspections.

This inspection flags code that mixes `@Nullable` values and
non-`@Nullable` params. Such code is likely erroneous and a common
place for NPEs to hide.

Add support for settings repository

add SUGGEST_NULLABLE_ANNOTATIONS inspection

…-effects

…tax-assertions

Exclude property access inspections on assertj assertions due to side-effects

ALLOW_TRAILING_COMMA configuration does not currently get picked up by
IJ/AS, it only works if it's set up using legacy `JetCodeStyleSettings`
block. See https://youtrack.jetbrains.com/issue/KTIJ-22516 for more
details, enabling trailing commas via `JetCodeStyleSettings` until the
IDE bug is fixed.

Fix trailing commas configuration - KTIJ-22516.

Disable new line after multiline when statement

Specify an explicit import layout instead of relying on the Kotlin Official default. The Kotlin Official style uses `ij_kotlin_imports_layout = *,java.**,javax.**,kotlin.**,^`. There isn't a reason why these packages should be treated differently. The new explicit import layout changes it to `ij_kotlin_imports_layout = *`, which is for example used by ktfmt, too.

Explicit Kotlin import layout

These code styles aren't maintained anymore. Block / Square has adopted [ktfmt](https://github.com/facebook/ktfmt) with its code style. [`.editorconfig`](https://spec.editorconfig.org/index.html) files are a better alternative to share code styles and are supported in Jetbrains IDEs.

Deprecate this project