Added scripts to test apis

samples/README.MD

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+
+# DynamoDB Adapter Demo Setup
+
+This README outlines the steps to set up a test environment for using the DynamoDB adapter with Cloud Spanner. Follow these instructions to create the necessary tables, insert sample data, and configure the adapter.
+
+## 1. Create a Sample Table for Demo Operations
+
+The following SQL statement creates a table `employee_table` in Cloud Spanner, which will be used to demonstrate DynamoDB operations through the adapter:
+
+```sql
+CREATE TABLE employee_table (
+  emp_name STRING(MAX),
+  emp_id FLOAT64,
+  emp_image BYTES(MAX),
+  isHired BOOL 
+) PRIMARY KEY(emp_id);
+```
+
+## 2. Create `dynamodb_adapter_table_ddl` Table
+
+The DynamoDB adapter requires a table to store metadata about the schema for other tables. Use the following SQL statement to create this table:
+
+```sql
+CREATE TABLE dynamodb_adapter_table_ddl (
+  column         STRING(MAX),
+  tableName      STRING(MAX),
+  dataType       STRING(MAX),
+  originalColumn STRING(MAX),
+) PRIMARY KEY (tableName, column);
+```
+
+## 3. Insert Data into `dynamodb_adapter_table_ddl`
+
+Once the `dynamodb_adapter_table_ddl` table is created, insert the metadata for `employee_table` as follows:
+
+
+
+```sql
+INSERT INTO dynamodb_adapter_table_ddl (column, tableName, dataType, originalColumn)
+VALUES ('emp_name', 'employee_table', 'STRING(MAX)', 'emp_name');
+
+INSERT INTO dynamodb_adapter_table_ddl (column, tableName, dataType, originalColumn)
+VALUES ('emp_id', 'employee_table', 'FLOAT64', 'emp_id');
+
+INSERT INTO dynamodb_adapter_table_ddl (column, tableName, dataType, originalColumn)
+VALUES ('emp_image', 'employee_table', 'BYTES(MAX)', 'emp_image');
+
+INSERT INTO dynamodb_adapter_table_ddl (column, tableName, dataType, originalColumn)
+VALUES ('isHired', 'employee_table', 'BOOL', 'isHired');
+```
+
+## 4. Configuration Files
+
+The DynamoDB adapter requires several configuration files to function properly. Below are examples of these configuration files:
+
+### 4.1. `config.json`
+
+The `config.json` file contains the basic settings for the DynamoDB Adapter. Replace the `GoogleProjectID` and `SpannerDb` values with your own project and database names:
+
+```json
+{
+    "GoogleProjectID": "cassandra-to-spanner",
+    "SpannerDb": "cluster10",
+    "QueryLimit": 5000
+}
+```
+
+### 4.2. `spanner.json`
+
+The `spanner.json` file maps table names to Cloud Spanner instance IDs. Define the instance where each table resides:
+
+```json
+{
+    "dynamodb_adapter_table_ddl": "spanner-instance-dev",
+    "dynamodb_adapter_config_manager": "spanner-instance-dev",
+    "employee_table": "spanner-instance-dev"
+}
+```
+
+### 4.3. `tables.json`
+
+The `tables.json` file describes the DynamoDB table schema, including the partition and sort keys. Here's an example for `employee_table`:
+
+```json
+{
+    "employee_table": {
+        "partitionKey": "guid",
+        "sortKey": "context",
+        "spannerIndexName": "guid",
+        "actualTable": "employee_table"
+    }
+}
+```
+
+## 5. Build the Project
+
+Once the configuration files are set up, build the DynamoDB Adapter project by running:
+
+```bash
+go build
+```
+
+## 6. Start the Adapter
+
+After building the project, start the DynamoDB Adapter by running the following command:
+
+```bash
+./dynamodb-adapter
+```
+
+---
+
+Follow these steps to set up your DynamoDB Adapter environment and perform necessary operations using the `employee_table`. Let me know if you need further clarification or assistance!
+
+
+
+
+
+