Add a few asciidoc readmes (#72082)

* Add a few asciidoc readmes

* add updated code-exploration. Need to fix the script in another go to add asciidoc support. The snippet didn't show up anyway.

docs/developer/architecture/code-exploration.asciidoc

@@ -365,7 +365,10 @@ WARNING: Missing README.
 WARNING: Missing README.
 
 
-- {kib-repo}blob/{branch}/x-pack/plugins/embeddable_enhanced/README.md[embeddableEnhanced]
+- {kib-repo}blob/{branch}/x-pack/plugins/embeddable_enhanced[embeddableEnhanced]
+
+WARNING: Missing README.
+
 
 - {kib-repo}blob/{branch}/x-pack/plugins/encrypted_saved_objects/README.md[encryptedSavedObjects]
 

examples/README.md → examples/README.asciidoc

@@ -1,7 +1,9 @@
-## Example plugins
+[[example-plugins]]
+== Example plugins
 
 This folder contains example plugins. To run the plugins in this folder, use the `--run-examples` flag, via
 
-```
+[source,bash]
+----
 yarn start --run-examples
-```
+----

src/dev/precommit_hook/casing_check_config.js

@@ -30,6 +30,7 @@ export const IGNORE_FILE_GLOBS = [
  'docs/**/*',
  '**/bin/**/*',
  '**/+([A-Z_]).md',
+ '**/+([A-Z_]).asciidoc',
  '**/LICENSE',
  '**/*.txt',
  '**/Gruntfile.js',

src/plugins/dashboard/README.asciidoc

@@ -0,0 +1,5 @@
+[[kibana-dashboard-plugin]]
+== Dashboard plugin
+
+- Registers the dashboard application.
+- Adds a dashboard embeddable that can be used in other applications.

x-pack/plugins/embeddable_enhanced/README.asciidoc

@@ -0,0 +1,6 @@
+[[enhanced-embeddables-plugin]]
+== Enhanced embeddables plugin
+
+Enhances Embeddables by registering a custom factory provider. The enhanced factory provider
+adds dynamic actions to every embeddables state, in order to support drilldowns.
+