[Feature request] Recognize @source and maybe treat all @ started path as alias with markdown image

[Mister-Hope]

Clear and concise description of the problem

Some people may want to reference image from root, but in our latest changes, the markdown image syntax no longer supports alias.

![](a/b.jpg) is regarded as <img src="./a/b.jpg" /> even if a is a package name or valid alias.

This is more expected as a/b.jpg will be a relative path in most cases instead a path that need to be resolved with bundler.

Also, we provided backwards ability, that in case people want to use alias or package imports, they can use img tag:

<img src="a/b.jpg" /> will be ./b.jpg exports in package a.

But we internally support @source for src folder, and when users want to reference images in projects folder instead of public (in most cases people are using i18n, and a image is placed at root language, and they want to make the link constant in all languages like @source/guide/example.png)

Suggested solution

We'd better check whether a markdown image link is started with @source/ , to avoid a @source/a.jpg being parsed as @source/folder/@source/a.jpg from @source/folder/file.md.

And we may even treat all links started with @ as alias. This is more flexible that allows markdown image be default as relative links but still supports alias.

Alternative

No response

Additional context

No response

[Mister-Hope]

@meteorlxy

[Mister-Hope]

@meteorlxy Reping

[meteorlxy]

@source is an internal shim, cuz we are generating temp files from source files. Ideally we should remove the shim, allowing relative image reference from markdown directly.