Add update-details command to allow setting an issue details via CLI non-interactively.

src/pit.nim

@@ -306,6 +306,17 @@ when isMainModule:
       issue.store()
       updatedIssues.add(issue)
 
+  elif args["update-details"]:
+    let details =
+      if not args["--file"] or $args["--file"] == "-": readAll(stdin)
+      else: readFile($args["--file"])
+
+    for id in @(args["<id>"]):
+      var issue = ctx.cfg.tasksDir.loadIssueById(id)
+      issue.details = details
+      issue.store()
+      updatedIssues.add(issue)
+
   elif args["start"] or args["todo-today"] or args["done"] or
        args["pending"] or args["todo"] or args["suspend"]: