feat: Add support for passing a Go Context when making an API request

[lightster]

Fixes

This PR adds support for passing a Go Context when making an API request. All API methods will now have a matching function for passing a Go Context when make the API request. For example, the Taskrouter Workspaces CreateTask function will now have a corresponding CreateTaskWithContext method that accepts a Go context.Context as its first parameter.

• I have a separate PR in twilio-oai-generator: feat: Add support for passing a Go Context when making an API request using the Go library twilio-oai-generator#683
• This PR does not include code changes generated from twilio-oai-generator.
  • I can add the generated code to this branch/PR or a separate branch/PR if that will make code review easier.
• I still need to add tests and docs, but I wanted to get feedback and ensure the concept of this PR makes sense before putting more work into it.

Closes #255. Supersedes #287. Supersedes #290.

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the Contribution Guidelines and my PR follows them
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

[lightster]

@manisha1997 Do you know if this twilio.go file is actually generated by twilio-oai-generator as documented in the file header? If so, could you provide guidance on where in twilio-oai-generator the twilio.go file is generated and how I can run the generation?

I have not been able to figure this out on my own as of yet.

[lightster]

Admittedly this is less than ideal, but it allows us to add Context support without breaking backwards compatibility.