[$200] Allow for tags in project setup

[jmgasper]

When setting up a Topcoder-X project, we need to allow copilots to select the technology tags for challenges created for that project, for tracking purposes.

A Topcoder-X project will have "general" tags, like [React, Javascript, HTML], or [C#, SQL Server], etc...

Currently, we don't apply any technologies to challenges created by Topcoder-X, but this change will allow copilots to set the technologies used by that individual project, when creating challenges for that project. This is important for proper tracking on the Topcoder platform and for reporting internally.

UI Change

In the UI on the add / edit project screen, we want to have a dropdown / selection for Tags, exactly the same as we do now in work manager (screenshot below). You should be able to take the code right from Work Manager (https://github.com/topcoder-platform/work-manager) that uses the API call to https://api.topcoder-dev.com/v4/technologies to populate the list

Note that we need to differentiate between dev and prod, so don't just hard code in the API call - make sure it uses the correct environment path, either Topcoder.com or Topcoder-dev.com.

DynamoDB change

In the DynamoDB, we need to have a new field added to store the selected technologies along with the project record. Please ensure that:

1. We can support existing projects that haven't selected a technology. An empty list should be allowed and will be the default for all existing projects
2. The change needed to the schema is properly built and can be easily applied to the existing schema, since we're going to apply this over current data in the database and can't lose any data or expect to reset the database.

Topcoder-x-processor change

The Topcoder-X processor will need to change to use the list of tags when building the challenge object and POSTing that to the challenge API. You can see how Work Manager sends the tags list and do the exact same thing in the Topcoder-X processor. Make sure the processor uses the list pulled from DynamoDB for the project.

[jmgasper]

Challenge https://www.topcoder.com/challenges/f23bd725-d7dc-4b69-902d-62fa57577138 has been created for this ticket.

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[jmgasper]

Challenge https://www.topcoder.com/challenges/f23bd725-d7dc-4b69-902d-62fa57577138 has been assigned to 52code.

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[jmgasper]

@52cs - How's this one coming? Will it be done soon?

[52cs]

@jmgasper
Have a look at draft version.
Two questions:

1. Do we care about the order of tags which displayed in the challenge page?
   If so, the challenge tags will be updated even if from tags ['a', 'b', 'c'] to ['c', 'b', 'a'].
   You can change this setting by https://github.com/topcoder-platform/topcoder-x-ui/blob/9d116739423efc56e898117bf902f57362e44139/src/front/src/app/upsertproject/upsertproject.html#L82

2. PATCH /challenges/:challengeId requires the tags not be empty: tags: Joi.array().items(Joi.string().required()).min(1), // tag names
   So, I restrict the new created or updated project should have non-empty tags currently.
   We can also remove this restrict and throw error when try to update challenges with empty tags which may occur with the feature of Bug - Archived projects still using copilot handle #442 [$40] Error when creating new project in dev #448

[jmgasper]

1. No, the order doesn't matter, thanks.
2. I'm fine if we restrict it going forward - I'll make sure copilots know about this when it's deployed to prod, thanks.