Create README.md

Created Readme for Oracle property graph presentations.

Author: uschwinn

data-platform/core-converged-db/property-graph/oracle-graph-presentations/README.md

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+## Oracle Property Graph Presentations
+This presentation provides information about general Oracle Property Graph functions and highlights Oracle Database 23 features. 
+
+Reviewed: 29.04.2024
+
+# When to use this asset?
+
+To present or to learn about Oracle Text.
+
+# How to use this asset?
+
+Use PDF as a presentation.
+
+# License
+
+Copyright (c) 2024 Oracle and/or its affiliates.
+
+Licensed under the Universal Permissive License (UPL), Version 1.0.
+
+See [LICENSE](https://github.com/oracle-devrel/technology-engineering/blob/main/LICENSE) for more details.