(control) Sort upload listing results

Improve the UX of the sideload GUI by sorting the results in a sensible fashion, first by whether it's a directory, then by its filename.

The change also changes the timestamp rendering to a more human-readable format than full ISO-8601.

code/services-core/control-service/src/main/resources/templates/control/node/actions/partial-sideload-dirtree.hdb

@@ -15,7 +15,7 @@ for more information on how to set this up.
                         <label class="form-check-label" for="{{name}}">{{name}}{{#if directory}}/{{/if}}</label>
                     </td>
                     <td>{{#unless directory}}{{size}}{{/unless}}</td>
-                    <td>{{lastModifiedTime}}</td>
+                    <td title={{lastModifiedTime}}>{{shortTimestamp lastModifiedTime}}</td>
                 </tr>
             {{/each}}
             {{#unless uploadDirContents.items}}

code/services-core/control-service/src/main/resources/templates/control/node/actions/partial-sideload-encyclopedia.hdb

@@ -25,7 +25,7 @@
                         <label class="form-check-label" for="{{name}}">{{name}}{{#if directory}}/{{/if}}</label>
                     </td>
                     <td>{{#unless directory}}{{size}}{{/unless}}</td>
-                    <td>{{lastModifiedTime}}</td>
+                    <td title={{lastModifiedTime}}>{{shortTimestamp lastModifiedTime}}</td>
                 </tr>
             {{/each}}
             {{#unless uploadDirContents.items}}

code/services-core/control-service/src/main/resources/templates/control/node/actions/partial-sideload-reddit.hdb

@@ -1,7 +1,7 @@
 <h1 class="my-3">Sideload Reddit</h1>
 
 <div class="my-3 p-3 border bg-light">
-This will index a pushshift.io dump from the Reddit API into index.
+This will index a pushshift.io "top-n subreddits" dump from the Reddit API into index.
 </div>
 <form method="post" action="actions/sideload-reddit" onsubmit="return confirm('Confirm sideloading')">
     <div class="my-3 py-3">
@@ -14,7 +14,7 @@ This will index a pushshift.io dump from the Reddit API into index.
                         <label class="form-check-label" for="{{name}}">{{name}}{{#if directory}}/{{/if}}</label>
                     </td>
                     <td>{{#unless directory}}{{size}}{{/unless}}</td>
-                    <td>{{lastModifiedTime}}</td>
+                    <td title={{lastModifiedTime}}>{{shortTimestamp lastModifiedTime}}</td>
                 </tr>
             {{/each}}
             {{#unless uploadDirContents.items}}

code/services-core/control-service/src/main/resources/templates/control/node/actions/partial-sideload-stackexchange.hdb

@@ -18,7 +18,7 @@ information how to do this.
                         <label class="form-check-label" for="{{name}}">{{name}}{{#if directory}}/{{/if}}</label>
                     </td>
                     <td>{{#unless directory}}{{size}}{{/unless}}</td>
-                    <td>{{lastModifiedTime}}</td>
+                    <td title={{lastModifiedTime}}>{{shortTimestamp lastModifiedTime}}</td>
                 </tr>
             {{/each}}
             {{#unless uploadDirContents.items}}

code/services-core/control-service/src/main/resources/templates/control/node/actions/partial-sideload-warc.hdb

@@ -17,7 +17,7 @@ A warc export can be created using e.g. wget: <p>
                         <label class="form-check-label" for="{{name}}">{{name}}{{#if directory}}/{{/if}}</label>
                     </td>
                     <td>{{#unless directory}}{{size}}{{/unless}}</td>
-                    <td>{{lastModifiedTime}}</td>
+                    <td title={{lastModifiedTime}}>{{shortTimestamp lastModifiedTime}}</td>
                 </tr>
             {{/each}}
             {{#unless uploadDirContents.items}}

code/services-core/executor-service/src/main/java/nu/marginalia/executor/svc/SideloadService.java

@@ -16,6 +16,7 @@ import java.nio.file.Path;
 import java.time.LocalDateTime;
 import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
+import java.util.Comparator;
 
 public class SideloadService {
     private final ExecutorActorControlService actorControlService;
@@ -61,7 +62,10 @@ public class SideloadService {
     public RpcUploadDirContents listUploadDir() throws IOException {
         Path uploadDir = WmsaHome.getUploadDir();
 
-        try (var items = Files.list(uploadDir)) {
+        try (var items = Files.list(uploadDir).sorted(
+                Comparator.comparing((Path d) -> Files.isDirectory(d)).reversed()
+                          .thenComparing(path -> path.getFileName().toString())
+        )) {
             var builder = RpcUploadDirContents.newBuilder().setPath(uploadDir.toString());
 
             var iter = items.iterator();