Add a config for new Rudder docs based on Antora

[amousset]

This is a new config for Rudder documentation (we already have https://github.com/algolia/docsearch-configs/blob/master/configs/rudder_project.json), for our new doc site based on Antora. This config is hence based on https://github.com/algolia/docsearch-configs/blob/master/configs/antora.json.
Note: I put 0 as conversation_id as I do not know what to put here.

[s-pace]

• Copy the following CSS/JS snippets and add them to your page

<!-- at the end of the HEAD --> 
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css" /> 

<!-- at the end of the BODY --> 
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script> 
<script type="text/javascript"> docsearch({ 
apiKey: 'cd30a0d30ff5152bad8f0f74d6b73875', 
indexName: 'rudder', 
inputSelector: '### REPLACE ME ####', 
debug: false // Set debug to true if you want to inspect the dropdown 
}); 
</script> 

• Add a search input in your page if you don't have any yet. Then update the inputSelector value in JS snippet to a CSS selector that targets your search input field.
• Optionally customize the look and feel by following the DocSearch documentation
• You can also check your configuration in our github repo.
• Alexis has already an Algolia account. Analytics available from the Algolia dashboard by selecting the application DOCSEARCH (access granted)

[amousset]

Thanks, it works well!