[DE-1040] ArangoDB Tinkerpop Provider: initial documentation (#750)

* ArangoDB Tinkerpop Provider: initial documentation

* fixed links

* review

* updated GraphFeatures

* doc: gremlin console (DE-1062)

* doc: gremlin server (DE-1061)

* updated tinkerpop version to 3.7.4

* doc: fix complex id format

* removed collection name prefix restriction

* configurable label field name (DE-1070)

* query optimizations

* review; add content to all versions

* keep vertex instead of node to align with tinkerpop concepts and terminology

---------

Co-authored-by: Paula Mihu <97217318+nerpaula@users.noreply.github.com>
Co-authored-by: Paula <paula.mihu@arangodb.com>

Author: rashtao

site/content/3.12/develop/integrations/_index.md

@@ -47,3 +47,12 @@ allows you to export data from Apache Kafka to ArangoDB.
 - Repository: [github.com/arangodb/kafka-connect-arangodb/](https://github.com/arangodb/kafka-connect-arangodb/)
 - [Demo](https://github.com/arangodb/kafka-connect-arangodb/tree/main/demo)
 - [Changelog](https://github.com/arangodb/kafka-connect-arangodb/blob/main/ChangeLog.md)
+
+## TinkerPop Provider
+
+The [**ArangoDB TinkerPop Provider**](arangodb-tinkerpop-provider.md) is an implementation of 
+the [Apache TinkerPop OLTP Provider](https://tinkerpop.apache.org/docs/3.7.3/dev/provider) API 
+for ArangoDB.
+
+- Repository: [github.com/arangodb/arangodb-tinkerpop-provider](https://github.com/arangodb/arangodb-tinkerpop-provider)
+- [Changelog](https://github.com/arangodb/arangodb-tinkerpop-provider/blob/main/CHANGELOG.md)