codeowners: Add file

Adds a file with codeowners

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
diff --git a/CODEOWNERS b/CODEOWNERS
new file mode 100644
index 0000000..b9f8e8b
--- /dev/null
+++ b/CODEOWNERS
@@ -0,0 +1,9 @@
+boot/boot_serial @nordicjm @de-nordic
+boot/bootutil @davidvincze
+boot/cypress @romanjoe
+boot/espressif @almir-okato
+boot/mynewt @kasjer
+boot/nuttx @michallenc
+boot/zcbor @nordicjm @de-nordic
+boot/zephyr @nordicjm @de-nordic
+* @d3zd3z