chore(ci): add screenshots generation (#9582)

**Description**
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⚒️ Fixes  # <!--(issue)-->

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code

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**📃 Notes:**
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**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [ ] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [ ] ⬆️ I increased versions for any altered app according to semantic
versioning

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🪞 I have opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

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.github/scripts/build-catalog.sh

@@ -75,6 +75,18 @@ patch_apps() {
     sed -i "s|^icon:|icon_url:|g" catalog/${train}/${chartname}/item.yaml
     echo "categories:" >> catalog/${train}/${chartname}/item.yaml
     cat ${target}/Chart.yaml | yq '.annotations."truecharts.org/catagories"' -r >> catalog/${train}/${chartname}/item.yaml
+
+    # Generate screenshots
+    screenshots=$(ls ${target}/screenshots)
+    if [[ -n $screenshots ]]; then
+        echo "screenshots:" >> catalog/${train}/${chartname}/item.yaml
+        for screenshot in $screenshots; do
+            echo "  - https://truecharts.org/img/hotlink-ok/chart-screenshots/${chartname}/${screenshot}" >> catalog/${train}/${chartname}/item.yaml
+        done
+    else
+        echo "screenshots: []" >> catalog/${train}/${chartname}/item.yaml
+    fi
+    rm -rf ${target}/screenshots
     # Copy changelog from website
     if [[ ! -f "website/docs/charts/${train}/${chartname}/CHANGELOG.md" ]]; then
         touch "website/docs/charts/${train}/${chartname}/CHANGELOG.md"

.github/workflows/charts-release.yaml

@@ -184,6 +184,7 @@ jobs:
                 mkdir -p website/docs/charts/${train}/${chart} || echo "chart path already exists, continuing..."
                 yes | cp -rf charts/${train}/${chart}/docs/* website/docs/charts/${train}/${chart}/ 2>/dev/null || :
                 yes | cp -rf charts/${train}/${chart}/icon.png website/static/img/hotlink-ok/chart-icons/${chart}.png 2>/dev/null || :
+                yes | cp -rf charts/${train}/${chart}/screenshots/* website/static/img/hotlink-ok/chart-screenshots/${chart}/ 2>/dev/null || :
 
                 # Copy over kept documents
                 mv -f tmp/website/docs/charts/${train}/${chart}/CHANGELOG.md website/docs/charts/${train}/${chart}/CHANGELOG.md 2>/dev/null || :