Create write.md

Author: DeveloperTryingToCodeLikeOtherOfThem

docs/reference/buffer/write.md

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+## write
+Copy contents of the source buffer into the destination buffer at the specified byte offset (dstOffset). 
+
+``` sig
+    Buffer.create(null).write(null, null);
+```
+
+## Parameters
+**dstOffset:** The byte offset in the destination buffer where the contents of the source buffer will be written.
+**src:** The source buffer that contain contents will be copied into the destination buffer.
+
+## Example
+
+Create a new buffer that copies 2 offsets of the original buffer.
+``` ts
+    const buf = Buffer.create(30);
+    const newBuf = Buffer.create(2);
+    newBuf.write(0, newBuf);
+    newBuf.write(1, newBuf);
+```