Resolve uri started with slash.

[vanadium23]

I have an absolute path links, that works fine in VS Code, but the plugin does not detect them as links.

Example like this:

<!-- first.md -->

# First

Hello world!

<!-- some/long/path/second.md -->

# Second

[here](/first.md)

We can replace root as workspaceFolder.

P.s. I want first to discuss this feature, and if it is good than can implement. :)

[tchayen]

I am sorry for the long response time. I can't see any problem with this idea so if you are interested in developing a solution for this I am very glad and open to help.

[tchayen]

I've just now discovered that another good suggestions regarding file discovery was mentioned in #47. If you will be working on that, would you mind abstracting a proper function for normalizing/stripping the URL so we could also easily add support for that?