Feat get beckn action if applicable

[mayurvir]

Description

This PR will add a new service AI.js that contains a function to get beckn action if applicable from a given text input.

Features covered

• Add function to get beckn action from text if applicable. #2

Changes made

• Added openai config for actions contexts
• Added AI.js service
• Added test cases for the newly created function
• Corrections made in .env.sample file
• Added pull request template

Screenshots/recordings

NA

Testing

Run test cases :

npm run test

Self checks

• Code follows coding style guidelines.
• All tests pass successfully.
• No new linting errors or warnings.
• Documentation is updated, if necessary.
• Dependencies are updated, if required.
• There are no merge conflicts.

Reviewer Suggestions

None