feat: HTTP api for controlling t-timers

[anteeek]

About the Contributor

This PR is made on behalf of the BBC

Type of Contribution

This is a:

Feature

Current Behavior

Currently, the t-timers functionality can be only controlled from the blueprints and from within sofie-core components internally.

New Behavior

This PR makes it possible to control t-timers using a new RESTful HTTP API. It exposes the write methods, as reads will be handled by connecting to LSG,

Testing

• I have added one or more unit tests for this PR
• I have updated the relevant unit tests
• No unit test changes are needed for this PR

Affected areas

Time Frame

We intend to finish the development on this feature in one week (until R53 is frozen)

Other Information

Note: this PR is waiting for #67 to be merged

Status

• PR is ready to be reviewed.
• The functionality has been tested by the author.
• Relevant unit tests has been added / updated.
• Relevant documentation (code comments, system documentation) has been added / updated.