chore: small improvements

[Rovasch]

Add installation and elasticpress plugin and adjust block in step 5 to allow better copy paste

[github-actions]

Coverage report for commit: 84abf9d
File: coverage.xml

Cover ┌─────────────────────────┐ Freq.
   0% │ ███████████████████████ │ 75.0%
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  30% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  40% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  50% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  60% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  70% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  80% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  90% │ ████░░░░░░░░░░░░░░░░░░░ │ 12.5%
 100% │ ████░░░░░░░░░░░░░░░░░░░ │ 12.5%
      └─────────────────────────┘
 *Legend:* █ = Current Distribution 

Summary - Lines: 79.71% | Methods: 22.22%

Files	Lines	Methods	Branches
src/Console
ChildThemeScaffoldCommand.php	87.50%	-	100.00%
ElasticsearchScaffoldCommand.php	-	-	100.00%
EventScaffoldCommand.php	-	-	100.00%
KnowledgebaseScaffoldCommand.php	-	-	100.00%
NewsScaffoldCommand.php	-	-	100.00%
PersonScaffoldCommand.php	-	-	100.00%
ProjectScaffoldCommand.php	-	-	100.00%
src
ScaffoldServiceProvider.php	100.00%	100.00%	100.00%

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