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-doc/src/main/kotlin/org/pkl/doc/Main.kt

@@ -17,6 +17,7 @@
 
 package org.pkl.doc
 
+import com.github.ajalt.clikt.core.main
 import com.github.ajalt.clikt.parameters.arguments.argument
 import com.github.ajalt.clikt.parameters.arguments.convert
 import com.github.ajalt.clikt.parameters.arguments.multiple
@@ -31,6 +32,7 @@ import org.pkl.commons.cli.cliMain
 import org.pkl.commons.cli.commands.BaseCommand
 import org.pkl.commons.cli.commands.BaseOptions.Companion.parseModuleName
 import org.pkl.commons.cli.commands.ProjectOptions
+import org.pkl.commons.cli.commands.installCommonOptions
 import org.pkl.commons.cli.commands.single
 import org.pkl.core.Release
 
@@ -39,12 +41,12 @@ internal fun main(args: Array<String>) {
   cliMain { DocCommand().main(args) }
 }
 
-class DocCommand :
-  BaseCommand(name = "pkldoc", helpLink = Release.current().documentation().homepage()) {
+val helpLink = "${Release.current().documentation.homepage}pkl-doc/index.html#cli"
 
+class DocCommand : BaseCommand(name = "pkldoc", helpLink = helpLink) {
   private val modules: List<URI> by
     argument(
-        name = "<modules>",
+        name = "modules",
         help = "Module paths/uris, or package uris to generate documentation for",
       )
       .convert { parseModuleName(it) }
@@ -53,7 +55,7 @@ class DocCommand :
   private val outputDir: Path by
     option(
         names = arrayOf("-o", "--output-dir"),
-        metavar = "<directory>",
+        metavar = "directory",
         help = "Directory where generated documentation is placed.",
       )
       .path()
@@ -69,6 +71,8 @@ class DocCommand :
 
   private val projectOptions by ProjectOptions()
 
+  override val helpString: String = "Generate HTML documentation from Pkl modules and packages."
+
   override fun run() {
     val options =
       CliDocGeneratorOptions(
@@ -79,4 +83,8 @@ class DocCommand :
       )
     CliDocGenerator(options).run()
   }
+
+  init {
+    installCommonOptions()
+  }
 }

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

@@ -15,6 +15,7 @@
  */
 package org.pkl.doc
 
+import com.github.ajalt.clikt.core.parse
 import org.assertj.core.api.Assertions.assertThat
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.assertThrows