Add Etherscan-style blockie identicon to address detail page

Show a 48px pixelated blockie (same style as Etherscan) centered
above the wallet title on the address detail page. Uses
ethereum-blockies-base64 which generates a base64 PNG from the
address. Replaces the previously added @metamask/jazzicon.

yarn.lock

@@ -1560,6 +1560,13 @@ esprima@^4.0.0:
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
   integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
 
+ethereum-blockies-base64@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/ethereum-blockies-base64/-/ethereum-blockies-base64-1.0.2.tgz#4aebca52142bf4d16a3144e6e2b59303e39ed2b3"
+  integrity sha512-Vg2HTm7slcWNKaRhCUl/L3b4KrB8ohQXdd5Pu3OI897EcR6tVRvUqdTwAyx+dnmoDzj8e2bwBLDQ50ByFmcz6w==
+  dependencies:
+    pnglib "0.0.1"
+
 ethers@^6.16.0:
   version "6.16.0"
   resolved "https://registry.yarnpkg.com/ethers/-/ethers-6.16.0.tgz#fff9b4f05d7a359c774ad6e91085a800f7fccf65"
@@ -2552,6 +2559,11 @@ pngjs@^5.0.0:
   resolved "https://registry.yarnpkg.com/pngjs/-/pngjs-5.0.0.tgz#e79dd2b215767fd9c04561c01236df960bce7fbb"
   integrity sha512-40QW5YalBNfQo5yRYmiw7Yz6TKKVr3h6970B2YE+3fQpsWcrbj1PzJgxeJ19DRQjhMbKPIuMY8rFaXc8moolVw==
 
+pnglib@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/pnglib/-/pnglib-0.0.1.tgz#f9ab6f9c688f4a9d579ad8be28878a716e30c096"
+  integrity sha512-95ChzOoYLOPIyVmL+Y6X+abKGXUJlvOVLkB1QQkyXl7Uczc6FElUy/x01NS7r2GX6GRezloO/ecCX9h4U9KadA==
+
 prettier@^3.8.1:
   version "3.8.1"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.8.1.tgz#edf48977cf991558f4fcbd8a3ba6015ba2a3a173"