feat: add new configuration for front buttons, more usable on landscape ccw (#460)

When reading on Landscape Counter ClockWise mode, the left/right button
appear inverted: the upper button (left) goes down and the lower button
(right) goes up.

Discussion: #449

## Summary

* **What is the goal of this PR?** (e.g., Implements the new feature for
file uploading.)
Add a new configuration for the front buttons: Back, Confirm, Right,
Left

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**NO**_

src/activities/settings/SettingsActivity.cpp

@@ -37,8 +37,9 @@ const SettingInfo readerSettings[readerSettingsCount] = {
 
 constexpr int controlsSettingsCount = 4;
 const SettingInfo controlsSettings[controlsSettingsCount] = {
-    SettingInfo::Enum("Front Button Layout", &CrossPointSettings::frontButtonLayout,
-                      {"Bck, Cnfrm, Lft, Rght", "Lft, Rght, Bck, Cnfrm", "Lft, Bck, Cnfrm, Rght"}),
+    SettingInfo::Enum(
+        "Front Button Layout", &CrossPointSettings::frontButtonLayout,
+        {"Bck, Cnfrm, Lft, Rght", "Lft, Rght, Bck, Cnfrm", "Lft, Bck, Cnfrm, Rght", "Bck, Cnfrm, Rght, Lft"}),
     SettingInfo::Enum("Side Button Layout (reader)", &CrossPointSettings::sideButtonLayout,
                       {"Prev, Next", "Next, Prev"}),
     SettingInfo::Toggle("Long-press Chapter Skip", &CrossPointSettings::longPressChapterSkip),