Add private data go application

Created project directory, app.go and connect.go files. Reused the logic for
connect.go from the events application and added second organization setup.

Implemented private data transaction example in go as described in the main
documentation in "Tutorials/Using Private Data in Fabric".

Updated README.md with the command to run the go application and the script
which runs the application in the Github Actions workflow.

Fixed typos and punctuation in the private data typescript application.

Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>

asset-transfer-private-data/README.md

@@ -53,9 +53,9 @@ Like other samples, the Fabric test network is used to deploy and run this sampl
 
    # To deploy the go chaincode implementation
    ./network.sh deployCC -ccn private -ccp ../asset-transfer-private-data/chaincode-go  -ccl go -ccep "OR('Org1MSP.peer','Org2MSP.peer')"  -cccg '../asset-transfer-private-data/chaincode-go/collections_config.json' -ccep "OR('Org1MSP.peer','Org2MSP.peer')"
-   
+
    # To deploy the typescript chaincode implementation
-   ./network.sh deployCC -ccn private -ccp ../asset-transfer-private-data/chaincode-typescript/ -ccl typescript  -ccep "OR('Org1MSP.peer','Org2MSP.peer')" -cccg ../asset-transfer-private-data/chaincode-typescript/collections_config.json 
+   ./network.sh deployCC -ccn private -ccp ../asset-transfer-private-data/chaincode-typescript/ -ccl typescript  -ccep "OR('Org1MSP.peer','Org2MSP.peer')" -cccg ../asset-transfer-private-data/chaincode-typescript/collections_config.json
    ```
 
 3. Run the application (from the `asset-transfer-private-data` folder).
@@ -64,6 +64,10 @@ Like other samples, the Fabric test network is used to deploy and run this sampl
    cd application-gateway-typescript
    npm install
    npm start
+
+   # To run the Go sample application
+   cd application-gateway-go
+   go run .
    ```
 
 ## Clean up
@@ -72,4 +76,4 @@ When you are finished, you can bring down the test network (from the `test-netwo
 
 ```
 ./network.sh down
-```
+```