feat: add workflow.featured.{add|list|remove|set} methods

[srtaalej]

This PR adds missing workflow.featured methods add, list, remove, set

Testing:

import com.slack.api.Slack;
import com.slack.api.methods.SlackApiException;
import com.slack.api.methods.response.workflows.WorkflowsFeaturedAddResponse;
import com.slack.api.methods.response.workflows.WorkflowsFeaturedListResponse;
import com.slack.api.methods.response.workflows.WorkflowsFeaturedRemoveResponse;
import com.slack.api.methods.response.workflows.WorkflowsFeaturedSetResponse;

import java.util.List;

Slack slack = Slack.getInstance();
String token = System.getenv("SLACK_BOT_TOKEN");

WorkflowsFeaturedAddResponse add = slack.methods(token)
    .workflowsFeaturedAdd(req -> req.channelId("C04CRUE6MU3").triggerIds(List.of("Ft07BVE8UHEK", "Ft0A4EDARZL6")));
System.out.println(add);

WorkflowsFeaturedListResponse list = slack.methods(token)
    .workflowsFeaturedList(req -> req.channelIds(List.of("C04CRUE6MU3")));
System.out.println(list);

WorkflowsFeaturedRemoveResponse remove = slack.methods(token)
    .workflowsFeaturedRemove(req -> req.channelId("C04CRUE6MU3").triggerIds(List.of("Ft07BVE8UHEK")));
System.out.println(remove);

WorkflowsFeaturedSetResponse set = slack.methods(token)
    .workflowsFeaturedSet(req -> req.channelId("C04CRUE6MU3").triggerIds(List.of("Ft0A4EDARZL6", "Ft07BVE8UHEK")));
System.out.println(set);

Category (place an x in each of the [ ])

• bolt (Bolt for Java)
• bolt-{sub modules} (Bolt for Java - optional modules)
• slack-api-client (Slack API Clients)
• slack-api-model (Slack API Data Models)
• slack-api-*-kotlin-extension (Kotlin Extensions for Slack API Clients)
• slack-app-backend (The primitive layer of Bolt for Java)

Requirements

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you agree to those rules.

[codecov]

Codecov Report

❌ Patch coverage is 90.69767% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.28%. Comparing base (a24a615) to head (5ae11bc).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...java/com/slack/api/methods/RequestFormBuilder.java	82.60%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1542      +/-   ##
============================================
+ Coverage     72.98%   73.28%   +0.30%     
- Complexity     4476     4511      +35     
============================================
  Files           477      477              
  Lines         14223    14266      +43     
  Branches       1483     1487       +4     
============================================
+ Hits          10380    10455      +75     
+ Misses         2964     2919      -45     
- Partials        879      892      +13     

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[zimeg]

📚 https://docs.slack.dev/reference/methods/workflows.featured.add/
📚 https://docs.slack.dev/reference/methods/workflows.featured.list/
📚 https://docs.slack.dev/reference/methods/workflows.featured.remove/
📚 https://docs.slack.dev/reference/methods/workflows.featured.set/

[zimeg]

🧪 Testing steps

import com.slack.api.Slack;
import com.slack.api.methods.SlackApiException;
import com.slack.api.methods.response.workflows.WorkflowsFeaturedAddResponse;
import com.slack.api.methods.response.workflows.WorkflowsFeaturedListResponse;
import com.slack.api.methods.response.workflows.WorkflowsFeaturedRemoveResponse;
import com.slack.api.methods.response.workflows.WorkflowsFeaturedSetResponse;

import java.util.List;

Slack slack = Slack.getInstance();
String token = System.getenv("SLACK_BOT_TOKEN");

WorkflowsFeaturedAddResponse add = slack.methods(token)
    .workflowsFeaturedAdd(req -> req.channelId("C04CRUE6MU3").triggerIds(List.of("Ft07BVE8UHEK", "Ft0A4EDARZL6")));
System.out.println(add);

WorkflowsFeaturedListResponse list = slack.methods(token)
    .workflowsFeaturedList(req -> req.channelIds(List.of("C04CRUE6MU3")));
System.out.println(list);

WorkflowsFeaturedRemoveResponse remove = slack.methods(token)
    .workflowsFeaturedRemove(req -> req.channelId("C04CRUE6MU3").triggerIds(List.of("Ft07BVE8UHEK")));
System.out.println(remove);

WorkflowsFeaturedSetResponse set = slack.methods(token)
    .workflowsFeaturedSet(req -> req.channelId("C04CRUE6MU3").triggerIds(List.of("Ft0A4EDARZL6", "Ft07BVE8UHEK")));
System.out.println(set);

[zimeg]

@srtaalej LGTM! Thanks so much for featuring these methods 🙏 ✨

I left a few comments but nothing is blocking IMHO. Some are related to testing and I was curious if a bot token was working for you? I found a restricted_action error so I had to use a user token.