fix: book canonical, fr/de pin warnings, pin grouping per locale, SEO checks

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

data/en/conexoes/ESP32.json

@@ -29,7 +29,7 @@
       "Low-noise amplifier (LNA) input for Wi-Fi and Bluetooth receiver"
     ],
     "categorias": [
-      "Antenna"
+      "Antena"
     ],
     "avisos": [
       "Refer to datasheet section 2.4 for more details on analog pins"
@@ -1090,7 +1090,7 @@
       "VDDA"
     ],
     "funcoes": [
-      "Capacitor de filtro"
+      "Filter capacitor"
     ],
     "categorias": [
       "Power"
@@ -1108,7 +1108,7 @@
       "VDDA"
     ],
     "funcoes": [
-      "Capacitor de filtro"
+      "Filter capacitor"
     ],
     "categorias": [
       "Power"