Added basic tag filters, removed tag filter section temporarily

Update app.py, content.json, and 9 more files...

data/strings/en/content.json

@@ -83,5 +83,7 @@
   "content.commons.lang.luxembourgish": "Luxembourgish",
   "content.commons.lang.english.639-3": "English (eng)",
   "content.commons.lang.french.639-3": "French (fra)",
-  "content.commons.lang.luxembourgish.639-3": "Luxembourgish (ltz)"
+  "content.commons.lang.luxembourgish.639-3": "Luxembourgish (ltz)",
+
+  "filters.summary": "Click to show/hide tag filters"
 }

data/strings/fr/content.json

@@ -76,5 +76,7 @@
 	"content.commons.lang.luxembourgish": "Luxembourgeois",
 	"content.commons.lang.english.639-3": "Anglais (eng)",
 	"content.commons.lang.french.639-3": "Français (fra)",
-	"content.commons.lang.luxembourgish.639-3": "Luxembourgeois (ltz)"
+	"content.commons.lang.luxembourgish.639-3": "Luxembourgeois (ltz)",
+
+  "filters.summary": "Cliquez pour afficher/cacher les filtres"
 }

data/tools/.png-optimizer.yml

@@ -28,4 +28,4 @@ tools:
         title_key: "meta.title"
         subtitle_key: "article.subtitle"
         tags:
-          - "undefined"
+          - "graphics"

data/tools/.svg-to-png.yml

@@ -24,7 +24,7 @@ metadata:
     title_key: "meta.title"
     subtitle_key: "article.subtitle"
     tags:
-      - "undefined"
+      - "graphics"
 resources:
   scripts:
     - "svg-to-png.mjs"

data/tools/png-analyser.yml

@@ -27,4 +27,5 @@ tools:
         title_key: "meta.title"
         subtitle_key: "article.subtitle"
         tags:
-          - "undefined"
+          - "graphics"
+          - "analyser"