Add Cypher template diagrams (#13913)

templates/neo4j-cypher-ft/README.md

@@ -9,6 +9,8 @@ The package utilizes a full-text index for efficient mapping of text values to d
 
 In the provided example, the full-text index is used to map names of people and movies from the user's query to corresponding database entries.
 
+![Workflow diagram](https://raw.githubusercontent.com/langchain-ai/langchain/master/templates/neo4j-cypher-ft/static/workflow.png)
+
 ## Environment Setup
 
 The following environment variables need to be set:

templates/neo4j-cypher-memory/README.md

@@ -7,6 +7,8 @@ Additionally, it features a conversational memory module that stores the dialogu
 The conversation memory is uniquely maintained for each user session, ensuring personalized interactions.
 To facilitate this, please supply both the `user_id` and `session_id` when using the conversation chain.
 
+![Workflow diagram](https://raw.githubusercontent.com/langchain-ai/langchain/master/templates/neo4j-cypher-memory/static/workflow.png)
+
 ## Environment Setup
 
 Define the following environment variables:

templates/neo4j-cypher/README.md

@@ -5,6 +5,8 @@ This template allows you to interact with a Neo4j graph database in natural lang
 
 It transforms a natural language question into a Cypher query (used to fetch data from Neo4j databases), executes the query, and provides a natural language response based on the query results.
 
+[![Workflow diagram](https://raw.githubusercontent.com/langchain-ai/langchain/master/templates/neo4j-cypher/static/workflow.png)](https://medium.com/neo4j/langchain-cypher-search-tips-tricks-f7c9e9abca4d)
+
 ## Environment Setup
 
 Define the following environment variables: