Show annotations in oras discover

[shizhMSFT]

Showing the annotations as a part of the OCI specification -

@shizhMSFT @FeynmanZhou - thoughts on how you to show annotations in the discover command -

Originally posted by @sajayantony in #630 (comment)

[shizhMSFT]

@sajayantony Annotations in oras discover looks interesting. I'd like to have key: value instead of key=value printed.

We also need to find out the UX for other layouts besides tree.

[FeynmanZhou]

Replied on #630 (comment).

Let me investigate this CLI UX.

[sajayantony]

Keeping the string same enables consistent parsing across manifest and outputs is my take.

[qweeah]

@sajayantony Annotations in oras discover looks interesting. I'd like to have key: value instead of key=value printed.

We also need to find out the UX for other layouts besides tree.

@shizhMSFT Seems key: value is not an option since datetime format might conatin :

[shizhMSFT]

Keeping the string same enables consistent parsing across manifest and outputs is my take.

That makes sense.

[shizhMSFT]

@qweeah The value can be anything so that we are more focusing on the UX other than the content value.
For instance, {"foo":"bar=fun"} will result in foo=bar=fun.