feat: added basic command issuing

sparse-server/style/beacons/_commands.scss

@@ -0,0 +1,38 @@
+main.beacons div.commands {
+    padding: 10px;
+    overflow-y: scroll;
+
+    fieldset {
+        display: grid;
+        grid-template-columns: 400px 200px;
+        grid-row-gap: 10px;
+
+        input, label {
+            margin: 10px;
+        }
+    }
+
+    .cmd-exec, .cmd-install, .cmd-upload, .cmd-download, .cmd-chdir {
+        display: none;
+    }
+
+    select[name="cmd_type"]:has(> option[value="exec"]:checked) ~ .cmd-exec {
+        display: block;
+    }
+
+    select[name="cmd_type"]:has(> option[value="upload"]:checked) ~ .cmd-upload {
+        display: block;
+    }
+
+    select[name="cmd_type"]:has(> option[value="download"]:checked) ~ .cmd-download {
+        display: block;
+    }
+
+    select[name="cmd_type"]:has(> option[value="chdir"]:checked) ~ .cmd-chdir {
+        display: block;
+    }
+
+    select[name="cmd_type"]:has(> option[value="install"]:checked) ~ .cmd-install {
+        display: block;
+    }
+}