Add an additional view for the accents on the Portuguese (Brazil) layout

and add a Portuguese layout based on it.

Part-of: <https://gitlab.gnome.org/World/Phosh/squeekboard/-/merge_requests/649>

data/keyboards/pt.yaml

@@ -0,0 +1,89 @@
+# This layout-file is a copy of "br.yaml"
+---
+outlines:
+    default:       { width: 35.67, height: 52 }
+    altline:       { width: 53,    height: 52 }
+    wide:          { width: 53,    height: 52 }
+    change-view:   { width: 53,    height: 52 }
+    spaceline:     { width: 90,    height: 52 }
+    special:       { width: 35.67, height: 52 }
+    large:         { width: 71.34, height: 52 }
+
+views:
+    base:
+        - "q w e r t y u i o p"
+        - "a s d f g h j k l ç"
+        - "Shift_L   z x c v b n m  BackSpace"
+        - "show_numbers show_eschars preferences         space     .-large Return"
+    upper:
+        - "Q W E R T Y U I O P"
+        - "A S D F G H J K L Ç"
+        - "Shift_L   Z X C V B N M  BackSpace"
+        - "show_numbers show_eschars preferences         space     ,-large Return"
+    numbers:
+        - "1 2 3 4 5 6 7 8 9 0"
+        - "@ # $ % & - _ + ( )"
+        - "show_symbols   , \" ' : ; ! ?  BackSpace"
+        - "show_letters show_eschars preferences space º . Return"
+    symbols:
+        - "~ ` | · √ π τ ÷ × ¶"
+        - "© ® £ € ¥ ^ ° * { }"
+        - "show_numbers   \\ / < > = [ ]  BackSpace"
+        - "show_letters show_eschars preferences         space       ≠ § Return"
+    eschars:
+        - "À Á Ã Â É Ê Í Ó Ô Õ"
+        - "à á ã â é ê í ó ô õ "
+        - "show_numbers Ú Ü ú ü ! ? . BackSpace"
+        - "show_letters show_eschars preferences         space    « »    Return"
+
+buttons:
+    Shift_L:
+        action:
+            locking:
+                lock_view: "upper"
+                unlock_view: "base"
+        outline: "change-view"
+        icon: "key-shift"
+    BackSpace:
+        outline: "altline"
+        icon: "edit-clear-symbolic"
+        action: "erase"
+    preferences:
+        action: "show_prefs"
+        outline: "special"
+        icon: "keyboard-mode-symbolic"
+    show_numbers:
+        action:
+            set_view: "numbers"
+        outline: "change-view"
+        label: "123"
+    show_letters:
+        action:
+            set_view: "base"
+        outline: "change-view"
+        label: "ABC"
+    show_symbols:
+        action:
+            set_view: "symbols"
+        outline: "change-view"
+        label: "*/="
+    show_eschars:
+        action:
+            locking:
+                lock_view: "eschars"
+                unlock_view: "base"
+        outline: "change-view"
+        label: "Ãã"
+    .-large:
+        outline: "large"
+        text: "."
+    ",-large":
+        outline: "large"
+        text: ","
+    space:
+        outline: "spaceline"
+        text: " "
+    Return:
+        outline: "wide"
+        icon: "key-enter"
+        keysym: "Return"