add the line methods

src/Gemtext/Body.php

@@ -10,12 +10,22 @@ class Body
 
     public function __construct(string $gemtext)
     {
-        foreach ((array) explode(PHP_EOL, $gemtext) as $line)
+        foreach ((array) explode(PHP_EOL, $gemtext) as $index => $line)
         {
-            $this->_lines[] = $line;
+            $this->_lines[$index] = $line;
         }
     }
 
+    public function getLine(int $index): ?int
+    {
+        return isset($this->_lines[$index]) ? $this->_lines[$index] : null;
+    }
+
+    public function getLines(): array
+    {
+        return $this->_lines;
+    }
+
     public function getH1(): array
     {
         $matches = [];