Support insert pictures

[quininer]

I've tried several open source apps, and this one has my favorite interactive mode, where I just open the app then input. but unfortunately it does not support insert pictures.

It would be useful if it could support insert pictures, as many things are difficult to express in words.

Thank you for developing this app. :)

[Voklen]

Thanks for using the app! I'd love to implement something like this but the app stores all the files in plaintext which is the main appeal for a lot of people since it allows you to easily open them up with different apps and sync it to other devices.
So although it would be useful I think it's out of scope for something like Daily Diary.

[quininer]

I think there is no conflict between plaintext and insert pictures, and we can support simple markdown syntax. still use plaintext for file, and load local image when rendering.