Steup CI (#1)

Setup Github actions CI to test and publish the library.

Reviewed-on: #1

src/main/kotlin/filesystem/FSCreator.kt

@@ -8,7 +8,10 @@ import java.nio.file.Path
 class FSCreator {
     // Create entry, leaving existing folders' contents, but overwriting existing files.
     @Throws(FileSystemException::class)
-    fun create(entryToCreate: FSEntry, destination: String) {
+    fun create(
+        entryToCreate: FSEntry,
+        destination: String,
+    ) {
         val queue = ArrayDeque<Pair<FSEntry, Path>>()
         queue.add(entryToCreate to Path.of(destination))
 
@@ -20,7 +23,8 @@ class FSCreator {
                     is FSFile -> Files.createFile(path)
                     is FSFolder -> Files.createDirectory(path)
                 }
-            } catch (_: FileAlreadyExistsException) {} // Allow files/folders to already exist.
+            } catch (_: FileAlreadyExistsException) {
+            } // Allow files/folders to already exist.
             when (entry) {
                 is FSFile -> Files.write(path, entry.content.toByteArray())
                 is FSFolder -> queue.addAll(entry.entries.map { it to path })

src/main/kotlin/filesystem/FSEntry.kt

@@ -4,6 +4,6 @@ package filesystem
 // (as we expect), and it also makes the class abstract as required.
 sealed class FSEntry(val name: String)
 
-class FSFile(name: String, val content: String): FSEntry(name)
+class FSFile(name: String, val content: String) : FSEntry(name)
 
-class FSFolder(name: String, val entries: List<FSEntry>): FSEntry(name)
+class FSFolder(name: String, val entries: List<FSEntry>) : FSEntry(name)