[mod] typification of SearXNG: add new result type KeyValue

This patch adds a new result type: KeyValue

- Python class:   searx/result_types/keyvalue.py
- Jinja template: searx/templates/simple/result_templates/keyvalue.html
- CSS (less)      client/simple/src/less/result_types/keyvalue.less

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

client/simple/src/less/definitions.less

@@ -57,6 +57,10 @@
   /// Answer Colors
   --color-answer-font: #444; // same as --color-base-font
   --color-answer-background: #fff;
+  // colors of the KeyValue result class
+  --color-result-keyvalue-col-table: #fdfbff;
+  --color-result-keyvalue-odd: #fdfbff;
+  --color-result-keyvalue-even: #fff;
   /// Results Colors
   --color-result-background: #fff;
   --color-result-border: #ddd;
@@ -180,6 +184,10 @@
   /// Answer Colors
   --color-answer-font: #bbb; // same as --color-base-font
   --color-answer-background: #26292f;
+  // colors of the KeyValue result class
+  --color-result-keyvalue-col-table: #1e1e22;
+  --color-result-keyvalue-odd: #1e1e22;
+  --color-result-keyvalue-even: #26292f;
   /// Results Colors
   --color-result-background: #26292f;
   --color-result-border: #333;

client/simple/src/less/result_types/keyvalue.less

@@ -0,0 +1,35 @@
+/*
+  Layout of the KeyValue result class
+*/
+#main_results .result-keyvalue {
+  caption {
+    padding: 0.8rem 0.5rem;
+    font-style: italic;
+    caption-side: bottom;
+    background-color: var(--color-result-keyvalue-table);
+  }
+
+  .col-key {
+    width: 25%;
+  }
+
+  table {
+    word-break: break-word;
+    table-layout: fixed;
+    width: 100%;
+    background-color: var(--color-result-keyvalue-table);
+  }
+
+  tr.odd {
+    background-color: var(--color-result-keyvalue-odd);
+  }
+
+  tr.even {
+    background-color: var(--color-result-keyvalue-even);
+  }
+
+  th,
+  td {
+    padding: 0.3rem 0.5rem;
+  }
+}

client/simple/src/less/style.less

@@ -1164,3 +1164,6 @@ summary.title {
 pre code {
   white-space: pre-wrap;
 }
+
+// import layouts of the Result types
+@import "result_types/keyvalue.less";