Bump clikt to 5.0.3 (#947)

This bumps Clikt from version 3 to version 5, which, among other things, improves
the help text formatting with colors.

Also: 
* Add `--version` flag to pkldoc, pkl-codegen-java, pkl-codegen-kotlin
* Add help text to pkldoc, pkl-codegen-java, pkl-codegen-kotlin

pkl-cli/src/test/kotlin/org/pkl/cli/CliMainTest.kt

@@ -16,6 +16,8 @@
 package org.pkl.cli
 
 import com.github.ajalt.clikt.core.BadParameterValue
+import com.github.ajalt.clikt.core.CliktError
+import com.github.ajalt.clikt.core.parse
 import java.nio.file.Path
 import kotlin.io.path.createDirectory
 import kotlin.io.path.createSymbolicLinkPointingTo
@@ -43,17 +45,20 @@ class CliMainTest {
           arrayOf("eval", "--output-path", "path1", "--output-path", "path2", inputFile)
         )
       }
-      .hasMessage("Invalid value for \"--output-path\": Option cannot be repeated")
+      .hasMessage("Option cannot be repeated")
 
     assertThatCode {
         rootCmd.parse(arrayOf("eval", "-o", "path1", "--output-path", "path2", inputFile))
       }
-      .hasMessage("Invalid value for \"--output-path\": Option cannot be repeated")
+      .hasMessage("Option cannot be repeated")
   }
 
   @Test
   fun `eval requires at least one file`() {
-    assertThatCode { rootCmd.parse(arrayOf("eval")) }.hasMessage("""Missing argument "<modules>"""")
+    assertThatCode { rootCmd.parse(arrayOf("eval")) }
+      .isInstanceOf(CliktError::class.java)
+      .extracting("paramName")
+      .isEqualTo("modules")
   }
 
   // Can't reliably create symlinks on Windows.
@@ -82,8 +87,7 @@ class CliMainTest {
   fun `cannot have multiple output with -o or -x`(@TempDir tempDir: Path) {
     val testIn = makeInput(tempDir)
     val testOut = tempDir.resolve("test").toString()
-    val error =
-      """Invalid value for "--multiple-file-output-path": Option is mutually exclusive with -o, --output-path and -x, --expression."""
+    val error = """Option is mutually exclusive with -o, --output-path and -x, --expression."""
 
     assertThatCode { rootCmd.parse(arrayOf("eval", "-m", testOut, "-x", "x", testIn)) }
       .hasMessage(error)

pkl-cli/src/test/kotlin/org/pkl/cli/CliTestRunnerTest.kt

@@ -15,7 +15,7 @@
  */
 package org.pkl.cli
 
-import com.github.ajalt.clikt.core.MissingArgument
+import com.github.ajalt.clikt.testing.test
 import java.io.StringWriter
 import java.io.Writer
 import java.net.URI
@@ -388,9 +388,9 @@ class CliTestRunnerTest {
   @Test
   fun `no source modules specified has same message as pkl eval`() {
     val e1 = assertThrows<CliException> { CliTestRunner(CliBaseOptions(), CliTestOptions()).run() }
-    val e2 = assertThrows<MissingArgument> { RootCommand().parse(listOf("eval")) }
-    assertThat(e1).hasMessageContaining("Missing argument \"<modules>\"")
-    assertThat(e1.message!!.replace("test", "eval")).isEqualTo(e2.helpMessage())
+    val e2 = RootCommand().test("eval")
+    assertThat(e1).hasMessageContaining("missing argument <modules>")
+    assertThat(e1.message!!.replace("test", "eval") + "\n").isEqualTo(e2.stderr)
   }
 
   @Test