Modify the lambda function to call the split, emotion, sentiment, and question APIs

[toddysm]

The Lambda function needs to call #118 #119 #120 #121 for the feedback, collect all the information for the feedback and reply back using the SWagger specified response.

Update the Swagger to make sure what is returned from the API is also specified in the Swagger.

[fikirmulu]

Time Spent until now:
Research on Lambda functions: 2hrs
Implementing simple lambda function: 2 hrs
Using Lambda function to call child lambda function: 4hrs

Awaiting update on #119, #120, and #121 to have callable endpoints to continue development of my lambda function.
This is the lambda function I have developed.

To test, simple pass an empty json, and it shall call the child lambda function.

[fikirmulu]

Below screenshot shows how I am calling Steven's "sw-test" lambda function.
I'm using the function ARN to send and receive a Payload from the child lambda function: sw-test

[fikirmulu]

Due to a dependency on tasks #119, #120, #121, we have decided to change the scope of this issue.

Update:

Scope of the infrastructure used to implement this has changed.

The latest code I have developed has finished this implementation for #118 as well #120. For the remaining tasks, we have decided to proceed by integrating these features into a single Lambda function, as explained by @shipitsteven in his Pull request to close #162

Work completed:

Parent_Lambda_2 currently has integrated the feature to call two of the initially planned issues - #118, as well as #120.
Following are the activities that I did as part of this Issue:

1. Ensured that the role "Lambda_role" had the privileges required to call other Lambda functions (Ref: [here]
   (https://www.sqlshack.com/calling-an-aws-lambda-function-from-another-lambda-function/#:~:text=In%20order%20to%20allow%20the,role%20to%20the%20lambda%20function.))
2. Configure the inputs expected by the child lambda functions, this was done by individually finding the json input expected for the Event Handlers in the individual lambda functions
3. Use the function ARN of the child lambda functions, along with "invoke" function from boto3's client function.
4. Configure the expected output in accordance with the output required for the frontend to work on this.

Testing:

Parent_Lambda_2 can be tested by giving any sample input as JSON to trigger it.
Ȏutput:

However, I have created a pull request to close this Issue by making some modifications to improve the documentation present.