feat: separate into "Download All" and "Update All" in font manager (#1955)

## Summary

* **What is the goal of this PR?**  
Separate the font manager's combined `Download / Update All` action into
separate `Download All` and `Update All` rows

* **What changes are included?**  
- Updated multiple i18n translation files to add `STR_UPDATE_ALL` and
adjust `STR_DOWNLOAD_ALL` text.
- Added separate handlers: `downloadAll()` for fonts that have been
installed and `updateAll()` for fonts with updates.
  - `Download All` and `Update All` are only shown when applicable.

---

### AI Usage

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please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**PARTIALLY**_

lib/I18n/translations/swedish.yaml

@@ -323,7 +323,8 @@ STR_SD_CARD_FULL: "Otillräckligt utrymme på SD-kortet"
 STR_FILES_LABEL: "Filer: "
 STR_SIZE_LABEL: "Storlek: "
 STR_REDOWNLOAD: "Ladda ner igen"
-STR_DOWNLOAD_ALL: "Ladda ner / Uppdatera alla"
+STR_DOWNLOAD_ALL: "Ladda ner alla"
+STR_UPDATE_ALL: "Uppdatera alla"
 STR_ALL_FONTS_INSTALLED: "Alla teckensnitt installerade!"
 STR_UPDATE_AVAILABLE: "Uppdatering"
 STR_CRASH_TITLE: "Systemkrasch"