Added a command to get all the checkers

It produces 
 /Users/ducasse/Documents/Pharo/vms/130-x64/Pharo.app/Contents/MacOS/Pharo /Users/ducasse/Documents/Pharo/images/P13-PillarCheckerIntegration2/P13-PillarCheckerIntegration2.image clap checker
s

The following checkers are available:
- CodeBlockValidator
- ReferenceChecks
- CodeIndentation
- EnglishTypography
- FrenchTypography
- CodeLastPeriod
- MethodReferenceUsingHash
- NotTheFigureX
- HeaderCapitalization
- Vocabulary
- MethodStructure
- ParagraphLabelEndPeriod
- CodeLastPeriodInCaption
- LastPeriodInCode

Author: Ducasse

src/Pillar-Cli-BookTester/ClapPillarCheckersCommand.class.st

@@ -0,0 +1,47 @@
+Class {
+	#name : 'ClapPillarCheckersCommand',
+	#superclass : 'ClapPillarCommand',
+	#category : 'Pillar-Cli-BookTester-Command',
+	#package : 'Pillar-Cli-BookTester',
+	#tag : 'Command'
+}
+
+{ #category : 'accessing' }
+ClapPillarCheckersCommand class >> commandName [
+	^ 'checkers'
+]
+
+{ #category : 'accessing' }
+ClapPillarCheckersCommand class >> commandSpecification [
+	<commandline>
+	
+	^ (ClapCommandSpec id: self commandName asSymbol)
+		commandClass: self; 
+		description: 'Give the list of all the checkers';
+		"addPositional: #requestedFile description: 'The main file';"
+		addHelp;
+		yourself
+]
+
+{ #category : 'execution' }
+ClapPillarCheckersCommand >> execute [
+	
+		self outputStreamDo: 
+			[ :str | str 
+							cr;
+							nextPutAll:  'The following checkers are available: '; cr .
+							MicChecker allSubclasses do: [ :each | 
+								str nextPutAll: '- '; nextPutAll: each checkerName; cr ]]
+]
+
+{ #category : 'execution' }
+ClapPillarCheckersCommand >> relativePathStringOf: aFile [
+
+	^ ((FileSystem workingDirectory resolve: aFile) relativeTo: FileSystem workingDirectory) fullName
+]
+
+{ #category : 'execution' }
+ClapPillarCheckersCommand >> requestedFile [
+
+	^ self positional: #requestedFile
+]