tasks: create internal github -> coder -> pr workflow #1031

Create a workflow that triggers a Coder Task to perform one or more of the following:

• Fix a test flake
• Work on a GitHub issue
• Create documentation

The workflow will look similar to the below:

flowchart TD
    A[Issue created] -->|tag @coder| B[Trigger workflow]
    B --> |Generate task input| C[Create Task owned by triggering user]
    C --> |Start AI agent| D{Work on issue}
    D --> |Complete work| E[Create draft PR and comment on issue]
    E --> |Fail to complete work| Z[Fail workflow and comment on issue]
    E --> |Assign to triggering user| F{User reviews changes}
    F --> |OK| G[Get external approval]
    F --> |NOT OK| H[User edits or abandons PR]

Steps:

Stage 1:

• Create "workspaces-only" workflow ci: add workflow for agentic issue triage coder#19839
• Integrate tasks CLI ci: create tasks instead of workspaces in ai triage workflow coder#19940
• Integrate tasks logs / send ci: integrate new tasks cli features in ai triage workflow coder#20007

Stage 2:

• Create task owned by user triggering workflow ci: assign tasks to triggering username in ai triage workflow coder#20022
• Trigger on label ci: allow dispatching workflow triage via label coder#20042 (and many more)- [ ]
• Auto-commit and create PR (baked into template)
• Add feedback loop on test failure

While performing the above, work around or address any blocking issues in the current implementation.