Add IDL quickstart img (#2858)

diff --git a/static/imgs/docs3-v2/java-sdk/quickstart/idl-directly-github-codespace-public.png b/static/imgs/docs3-v2/java-sdk/quickstart/idl-directly-github-codespace-public.png
new file mode 100644
index 0000000..0ee9dcb
--- /dev/null
+++ b/static/imgs/docs3-v2/java-sdk/quickstart/idl-directly-github-codespace-public.png
Binary files differ