Add deprecations to SignSide string methods (#9467)

patches/api/Adventure.patch

@@ -1687,6 +1687,36 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      /**
       * Gets all the lines of text currently on this side of the sign.
+      *
+      * @return Array of Strings containing each line of text
++     * @deprecated in favour of {@link #lines()}
+      */
+     @NotNull
++    @Deprecated // Paper
+     public String[] getLines();
+ 
+     /**
+@@ -0,0 +0,0 @@ public interface SignSide extends Colorable {
+      * @param index Line number to get the text from, starting at 0
+      * @return Text on the given line
+      * @throws IndexOutOfBoundsException Thrown when the line does not exist
++     * @deprecated in favour of {@link #line(int)}
+      */
+     @NotNull
++    @Deprecated // Paper
+     public String getLine(int index) throws IndexOutOfBoundsException;
+ 
+     /**
+@@ -0,0 +0,0 @@ public interface SignSide extends Colorable {
+      * @param index Line number to set the text at, starting from 0
+      * @param line New text to set at the specified index
+      * @throws IndexOutOfBoundsException If the index is out of the range 0..3
++     * @deprecated in favour of {@link #line(int, net.kyori.adventure.text.Component)}
+      */
++    @Deprecated // Paper
+     public void setLine(int index, @NotNull String line) throws IndexOutOfBoundsException;
+ 
+     /**
 diff --git a/src/main/java/org/bukkit/command/Command.java b/src/main/java/org/bukkit/command/Command.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/command/Command.java