feat: replace governance banner with builders call-to-action (#63)

The "Your Voice Matters" card used pezkuwiwallet://pezkuwi/open/governance.
That path prefix-matches the referendum deep link handler (/open/gov), which
requires an id; without one it reports "Referendum not found". Worse, a
matched-but-failed deep link is persisted and never cleared, so it replays on
every app launch.

Replace it with a builders/developer call-to-action (image: Gre Miraza scene)
that links to an external Telegram invite. External https links bypass the
in-app deep link engine entirely, so this card cannot get stuck.

prod + dev kept in sync; en/ku/tr localised.

banners/v2/content/assets/banners_dev.json

@@ -28,11 +28,11 @@
         "action": null
     },
     {
-        "id": "pezkuwi-governance-001",
+        "id": "pezkuwi-builders-001",
         "background": "https://raw.githubusercontent.com/pezkuwichain/pezkuwi-wallet-utils/master/banners/v2/resources/backgrounds/pezkuwi_purple_bg.png",
-        "image": "https://raw.githubusercontent.com/pezkuwichain/pezkuwi-wallet-utils/master/banners/v2/resources/images/pezkuwi_governance.png",
+        "image": "https://raw.githubusercontent.com/pezkuwichain/pezkuwi-wallet-utils/master/banners/v2/resources/images/gremiraza_builders.png",
         "clipsToBounds": false,
-        "action": "pezkuwiwallet://pezkuwi/open/governance"
+        "action": "https://t.me/+LvoC1nX11PowNzFi"
     },
     {
         "id": "pezkuwi-community-001",