Feature: Add per-runner “Disable/Pause” (#36776)

This PR adds per-runner disable/enable support for Gitea Actions so a
registered runner can be paused from picking up new jobs without
unregistering.

Disabled runners stay registered and online but are excluded from new
task assignment; running tasks are allowed to finish. Re-enabling
restores pickup, and runner list/get responses now expose disabled
state.

Also added an endpoint for testing
http://localhost:3000/devtest/runner-edit/enable

<img width="1509" height="701" alt="Bildschirmfoto 2026-02-27 um 22 13
24"
src="https://github.com/user-attachments/assets/5328eda9-e59c-46b6-b398-f436e50ee3da"
/>


Fixes: https://github.com/go-gitea/gitea/issues/36767

routers/api/v1/api.go

@@ -916,6 +916,7 @@ func Routes() *web.Router {
 				m.Post("/registration-token", reqToken(), reqOwnerCheck, act.CreateRegistrationToken)
 				m.Get("/{runner_id}", reqToken(), reqOwnerCheck, act.GetRunner)
 				m.Delete("/{runner_id}", reqToken(), reqOwnerCheck, act.DeleteRunner)
+				m.Patch("/{runner_id}", reqToken(), reqOwnerCheck, bind(api.EditActionRunnerOption{}), act.UpdateRunner)
 			})
 			m.Get("/runs", reqToken(), reqReaderCheck, act.ListWorkflowRuns)
 			m.Get("/jobs", reqToken(), reqReaderCheck, act.ListWorkflowJobs)
@@ -1043,6 +1044,7 @@ func Routes() *web.Router {
 					m.Post("/registration-token", reqToken(), user.CreateRegistrationToken)
 					m.Get("/{runner_id}", reqToken(), user.GetRunner)
 					m.Delete("/{runner_id}", reqToken(), user.DeleteRunner)
+					m.Patch("/{runner_id}", reqToken(), bind(api.EditActionRunnerOption{}), user.UpdateRunner)
 				})
 
 				m.Get("/runs", reqToken(), user.ListWorkflowRuns)
@@ -1728,6 +1730,7 @@ func Routes() *web.Router {
 					m.Post("/registration-token", admin.CreateRegistrationToken)
 					m.Get("/{runner_id}", admin.GetRunner)
 					m.Delete("/{runner_id}", admin.DeleteRunner)
+					m.Patch("/{runner_id}", bind(api.EditActionRunnerOption{}), admin.UpdateRunner)
 				})
 				m.Get("/runs", admin.ListWorkflowRuns)
 				m.Get("/jobs", admin.ListWorkflowJobs)