feat: make sidebar panels resizable (#2094)

- Replaces #1870, which replaced #1682, #1677

This mostly uses the code from there and addresses the comments I've
left. I didn't change the code much.

## Launch Checklist

Makes the sidebar panel resizable

<img width="707" height="511" alt="image"
src="https://github.com/user-attachments/assets/d010df38-faac-441c-bf7f-a4960e471c61"
/>


 - [x] Briefly describe the changes in this PR.
 - [x] Link to related issues.
- [x] Include before/after visuals or gifs if this PR includes visual
changes.
 - [x] Write tests for all new functionality.
 - [x] Add an entry to `CHANGELOG.md` under the `## main` section.

---------

Co-authored-by: Bart Louwers <bart.louwers@gmail.com>

src/locales/de/translation.json

@@ -54,6 +54,8 @@
   "Delete expression": "Ausdruck löschen",
   "Delete filter block": "Filterblock löschen",
   "Deuteranopia filter": "Deuteranopie-Filter",
+  "Drag to resize the layer list": "Ziehen, um die Ebenenliste zu skalieren",
+  "Drag to resize the sidebar": "Ziehen, um die Seitenleiste zu skalieren",
   "Duplicate": "Duplizieren",
   "Encoding": "Kodierung",
   "Enter URL...": "URL eingeben...",

src/locales/fr/translation.json

@@ -54,6 +54,8 @@
   "Delete expression": "Supprimer l'expression",
   "Delete filter block": "Supprimer le bloc de filtre",
   "Deuteranopia filter": "Filtre Deutéranopie",
+  "Drag to resize the layer list": "Glisser pour redimensionner la liste des calques",
+  "Drag to resize the sidebar": "Glisser pour redimensionner la barre latérale",
   "Duplicate": "Dupliquer",
   "Encoding": "Encodage",
   "Enter URL...": "Entrez l'URL...",

src/locales/he/translation.json

@@ -54,6 +54,8 @@
   "Delete expression": "מחיקת ביטוי",
   "Delete filter block": "מחיקת גוש מסנן",
   "Deuteranopia filter": "Deuteranopia filter",
+  "Drag to resize the layer list": "יש לגרור כדי לשנות את גודל רשימת השכבות",
+  "Drag to resize the sidebar": "יש לגרור כדי לשנות את גודל סרגל הצד",
   "Duplicate": "שכפול",
   "Encoding": "קידוד",
   "Enter URL...": "הכנסו כתובת",

src/locales/it/translation.json

@@ -54,6 +54,8 @@
   "Delete expression": "Elimina espressione",
   "Delete filter block": "Elimina blocco filtro",
   "Deuteranopia filter": "Filtro deuteranopia",
+  "Drag to resize the layer list": "Trascina per ridimensionare l'elenco dei livelli",
+  "Drag to resize the sidebar": "Trascina per ridimensionare la barra laterale",
   "Duplicate": "Duplica",
   "Encoding": "Codifica",
   "Enter URL...": "Inserisci URL...",

src/locales/ja/translation.json

@@ -54,6 +54,8 @@
   "Delete expression": "式を削除",
   "Delete filter block": "フィルタブロックを削除",
   "Deuteranopia filter": "緑色盲フィルタ",
+  "Drag to resize the layer list": "ドラッグしてレイヤーリストのサイズを変更",
+  "Drag to resize the sidebar": "ドラッグしてサイドバーのサイズを変更",
   "Duplicate": "複製",
   "Encoding": "エンコーディング",
   "Enter URL...": "URLを入力",

src/locales/ko/translation.json

@@ -54,6 +54,8 @@
   "Delete expression": "표현식 삭제",
   "Delete filter block": "필터 블록 삭제",
   "Deuteranopia filter": "녹색맹 필터",
+  "Drag to resize the layer list": "드래그하여 레이어 목록 크기 조정",
+  "Drag to resize the sidebar": "드래그하여 사이드바 크기 조정",
   "Duplicate": "복제",
   "Encoding": "인코딩",
   "Enter URL...": "URL 입력...",

src/locales/tr/translation.json

@@ -55,6 +55,8 @@
   "Delete filter block": "Filtre bloğunu sil",
   "Deuteranopia filter": "Döteranopi filtresi",
   "Drag and drop a style JSON file here or click to browse": "Bir stil JSON dosyasını buraya sürükleyip bırakın veya göz atmak için tıklayın",
+  "Drag to resize the layer list": "Katman listesini yeniden boyutlandırmak için sürükleyin",
+  "Drag to resize the sidebar": "Kenar çubuğunu yeniden boyutlandırmak için sürükleyin",
   "Duplicate": "Kopyala",
   "Encoding": "Kodlama",
   "Enter URL...": "URL girin...",

src/locales/zh/translation.json

@@ -54,6 +54,8 @@
   "Delete expression": "删除表达式",
   "Delete filter block": "删除过滤器块",
   "Deuteranopia filter": "绿色盲滤镜",
+  "Drag to resize the layer list": "拖动以调整图层列表大小",
+  "Drag to resize the sidebar": "拖动以调整侧边栏大小",
   "Duplicate": "复制",
   "Encoding": "编码",
   "Enter URL...": "输入URL...",