🌙 Added dark mode

Also:
- Add Roboto Monospace font
- Fix uneven margin lengths

Author: jackdevey

CodeView/src/main/res/font/roboto.ttf

@@ -9,10 +9,11 @@
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:background="@color/grey"
-        android:gravity="end"
+        android:gravity="start"
         android:padding="5dp"
         android:textColor="?android:attr/textColorPrimary"
-        android:textSize="12sp" />
+        android:textSize="12sp"
+        android:fontFamily="@font/roboto"/>
 
     <TextView
         android:id="@+id/line_text"

CodeView/src/main/res/layout/line.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="grey">#242323</color>
+    <color name="white">#171616</color>
+</resources>

CodeView/src/main/res/values-night/colours.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="grey">#DCDCDC</color>
+    <color name="grey">#f0f0f0</color>
+    <color name="white">#FFFFFF</color>
 </resources>