Added a TP README

Signed-off-by: Chris Helma <chelma+github@amazon.com>

TransformationPlayground/README.md

@@ -0,0 +1,74 @@
+# Transformation Playground
+
+This package contains the work-in-progress code for the Transformation Playground, a way for Elasticsearch and OpenSearch users to rapidly visualize the data and metadata within a Source cluster, create and test transformations in a sandbox, perform/test toy-scale migrations in a sandbox, and then kick off an at-scale migration.
+
+### Running the code
+
+#### Backend
+To run the backend code locally, use a Python virtual environment.  You'll need AWS Credentials in your AWS Keyring, permissions to invoke Bedrock, and to have onboarded your account to use Claude 3.5 Sonnet (`anthropic.claude-3-5-sonnet-20240620-v1:0`) in `us-west-2`.
+
+```
+# Start in the repo root
+
+python3 -m venv venv
+source venv/bin/activate
+pipenv sync --dev
+
+(cd tp_backend && python3 manage.py runserver)
+```
+
+This will start a Django REST Framework API running at `http://127.0.0.1:8000`.
+
+You can then hit the API to generate a transform for an Elasticsearch 6.8 Index Settings JSON to OpenSearch 2.17 like so:
+
+```bash
+curl -X POST "http://127.0.0.1:8000/transforms/index/" -H "Content-Type: application/json" -d '
+{
+    "transform_language": "Python",
+    "source_version": "Elasticsearch 6.8",
+    "target_version": "OpenSearch 2.17",
+    "input_shape": {
+        "index_name": "test-index",
+        "index_json": {
+            "settings": {
+                "index": {
+                    "number_of_shards": 1,
+                    "number_of_replicas": 0
+                }
+            },
+            "mappings": {
+                "type1": {
+                    "properties": {
+                        "title": { "type": "text" }
+                    }
+                },
+                "type2": {
+                    "properties": {
+                        "contents": { "type": "text" }
+                    }
+                }
+            }
+        }
+    },
+    "test_target_url": "http://localhost:29200"
+}'
+```
+
+The `test_target_url` is optional, but enables the system to test the output Index settings created by running the transform against the starting Index settings against a real OpenSearch domain by creating/deleting them on it.
+
+
+### Dependencies
+`pipenv` is used to managed dependencies within the project.  The `Pipefile` and `Pipefile.lock` handle the local environment.  You can add dependencies like so:
+
+```
+pipenv install boto3
+```
+
+This updates the `Pipfile`/`Pipfile.lock` with the new dependency.  To create a local copy of the dependencies, such as for bundling a distribution, you can use pip like so:
+
+```
+pipenv requirements > requirements.txt
+python3 -m pip install -r requirements.txt -t ./package --upgrade
+
+zip -r9 tp_backend.zip tools/ package/
+```