Add the remaining, wide shapes for layouts

There should be a wide shape for
all available layouts, so those can be used
well on devices in horizonal orientation.

Part-of: <https://gitlab.gnome.org/World/Phosh/squeekboard/-/merge_requests/630>

data/keyboards/bg_wide.yaml

@@ -0,0 +1,74 @@
+---
+outlines:
+    default:   { width: 48,     height: 42 }
+    altline:   { width: 68.95,  height: 42 }
+    wide:      { width: 72.01,  height: 42 }
+    spaceline: { width: 271.39, height: 42 }
+    special:   { width: 64.55,  height: 42 }
+
+views:
+    base:
+        - "у е и ш щ к с д з ц б"
+        - "ь я а о ж г т н в м ч"
+        - "Shift_L ю й ъ ф х п р л BackSpace"
+        - "show_numbers preferences         space   .    Return"
+    upper:
+        - "У Е И Ш Щ К С Д З Ц Б"
+        - "Ь Я А О Ж Г Т Н В М Ч"
+        - "Shift_L Ю Й Ъ Ф Х П Р Л BackSpace"
+        - "show_numbers preferences         space   ,    Return"
+    numbers:
+        - "1 2 3 4 5 6 7 8 9 0"
+        - "@ # € % & - _ + ( )"
+        - "show_symbols , \" ' : ; ! ? ѝ BackSpace"
+        - "show_letters preferences         space        Return"
+    symbols:
+        - "~ ` | · √ π τ ÷ × ¶"
+        - "© ® £ $ ¥ ^ ° * { }"
+        - "show_numbers_from_symbols   \\ / < > = [ ]  BackSpace"
+        - "show_letters preferences         space        Return"
+
+
+buttons:
+    Shift_L:
+        action:
+            locking:
+                lock_view: "upper"
+                unlock_view: "base"
+        outline: "altline"
+        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: "wide"
+        label: "123"
+    show_numbers_from_symbols:
+        action:
+            set_view: "numbers"
+        outline: "altline"
+        label: "123"
+    show_letters:
+        action:
+            set_view: "base"
+        outline: "wide"
+        label: "ABC"
+    show_symbols:
+        action:
+            set_view: "symbols"
+        outline: "altline"
+        label: "*/="
+    space:
+        outline: "spaceline"
+        text: " "
+    Return:
+        outline: "wide"
+        icon: "key-enter"
+        keysym: "Return"