chore: EXPOSED-573 Project detekt config does not check .kt or .kts i…

…n docs (#2366)

* chore: EXPOSED-573 Project detekt config does not check .kt or .kts in docs

- Local detekt workflow does not check documentation files, whereas the GitHub
workflow checks them if they include changes.
- Add documentation source files to project detekt config, so that results match
on TC and when PR opened.

buildSrc/src/main/kotlin/org/jetbrains/exposed/gradle/Detekt.kt

@@ -10,6 +10,13 @@ fun Project.configureDetekt() {
     apply<DetektPlugin>()
 
     configure<DetektExtension> {
+        source.from(
+            files(
+                "$rootDir/documentation-website/Writerside/snippets",
+                "$rootDir/samples"
+            )
+        )
+
         ignoreFailures = false
         buildUponDefaultConfig = true
         parallel = true