Color relief support and hillshading improvements. (#1371)

## Launch Checklist

This adds support for `relief-color` property so that it will create an
elevation expression when the button is pressed.
It also adds support for `colorArray` and `numberArray` types so that
the user would be able to add the relevant information.

Before:
<img width="403" height="324" alt="image"
src="https://github.com/user-attachments/assets/250abd81-6176-4711-a1ee-d33d443932d7"
/>

<img width="403" height="324" alt="image"
src="https://github.com/user-attachments/assets/6a1bb268-66db-42a1-97fc-33e5a40863b6"
/>


After:
<img width="403" height="324" alt="image"
src="https://github.com/user-attachments/assets/8ebaa1ea-4ef9-4aed-abcd-3c8b0057ea76"
/>

<img width="403" height="324" alt="image"
src="https://github.com/user-attachments/assets/e0728c92-85f9-4b86-8635-8877cf257b2f"
/>


 - [x] Briefly describe the changes in this PR.
- [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: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/locales/de/translation.json

@@ -16,6 +16,7 @@
   "Delete expression": "Ausdruck löschen",
   "Convert property into a zoom function": "Eigenschaft in eine Zoom-Funktion umwandeln",
   "Convert property to data function": "Eigenschaft in eine Datenfunktion umwandeln",
+  "Convert property into a elevation function": "Eigenschaft in eine Höhenfunktion umwandeln",
   "Layer <1>{formatLayerId(layerId)}</1>: {parsed.data.message}": "Ebene <1>{formatLayerId(layerId)}</1>: {parsed.data.message}",
   "switch to layer": "zur Ebene wechseln",
   "Map": "Karte",

src/locales/fr/translation.json

@@ -16,6 +16,7 @@
   "Delete expression": "Supprimer l'expression",
   "Convert property into a zoom function": "Convertir la propriété en fonction de zoom",
   "Convert property to data function": "Convertir la propriété en fonction de données",
+  "Convert property into a elevation function": "Convertir la propriété en fonction d'élévation",
   "Layer <1>{formatLayerId(layerId)}</1>: {parsed.data.message}": "Calque <1>{formatLayerId(layerId)}</1> : {parsed.data.message}",
   "switch to layer": "changer de calque",
   "Map": "Carte",

src/locales/he/translation.json

@@ -16,6 +16,7 @@
   "Delete expression": "מחיקת ביטוי",
   "Convert property into a zoom function": "המרה לפונקציית זום",
   "Convert property to data function": "המרה לפונקציית מידע",
+  "Convert property into a elevation function": "המרה לפונקציית גובה",
   "Layer <1>{formatLayerId(layerId)}</1>: {parsed.data.message}": "שכבה <1>{formatLayerId(layerId)}</1>: {parsed.data.message}",
   "switch to layer": "שינוי לשכבה",
   "Map": "מפה",

src/locales/it/translation.json

@@ -16,6 +16,7 @@
   "Delete expression": "Elimina espressione",
   "Convert property into a zoom function": "Converti proprietà in una funzione di zoom",
   "Convert property to data function": "Converti proprietà in una funzione dati",
+  "Convert property into a elevation function": "Converti proprietà in una funzione di elevazione",
   "Layer <1>{formatLayerId(layerId)}</1>: {parsed.data.message}": "Livello <1>{formatLayerId(layerId)}</1>: {parsed.data.message}",
   "switch to layer": "passa al livello",
   "Map": "Mappa",

src/locales/ja/translation.json

@@ -16,6 +16,7 @@
   "Delete expression": "式を削除",
   "Convert property into a zoom function": "プロパティをズーム関数に変換する",
   "Convert property to data function": "プロパティをデータ関数に変換する",
+  "Convert property into a elevation function": "プロパティを標高関数に変換する",
   "Layer <1>{formatLayerId(layerId)}</1>: {parsed.data.message}": "レイヤ<1>{formatLayerId(layerId)}</1>: {parsed.data.message}",
   "switch to layer": "レイヤへ切替",
   "Map": "地図",

src/locales/zh/translation.json

@@ -16,6 +16,7 @@
   "Delete expression": "删除表达式",
   "Convert property into a zoom function": "将属性转换为缩放函数",
   "Convert property to data function": "将属性转换为数据函数",
+  "Convert property into a elevation function": "将属性转换为高程函数",
   "Layer <1>{formatLayerId(layerId)}</1>: {parsed.data.message}": "图层<1>{formatLayerId(layerId)}</1>: {parsed.data.message}",
   "switch to layer": "切换到图层",
   "Map": "地图",