Slashlinks

[gordonbrander]

This proposal does a radical rethink of Subtext link syntax, proposing to replace the current block links with inline links that are much simpler.

The gist:

• Links are wrapped in angle brackets <https://example.com>, and can appear anywhere in text.
• You can also just paste bare links https://example.com, and Subtext will automatically link them. This only works for http and https, not exotic protocols like <ipfs://asdfasdfasdfasdf>. Use angle brackets for the funky stuff.
• This is a /slashlink it's a shortcut for linking to internal pages. Slashlinks can also include paths, /like/this.

/slashlinks are like the #hashtag of links. A simple syntax for referencing things. Spiritually similar to the original camelcase WikiLink. The simplest thing that could possibly work.

Rendered: https://github.com/gordonbrander/subtext/blob/slashlink/rfcs/2021-10-07-slashlinks.md

This PR also introduces a user guide, and rewrites the specification to reflect the proposed changes.

[gordonbrander]

In addition to playing with this markup in Subconscious prototypes, I've been converting the markdown posts at https://gordonbrander.com/pattern to test-drive this syntax.

I'm building confidence that this is a good way forward.

Another datapoint: the original wiki used a similar CamelCase WikiLink syntax. C2 Wiki, the original (and best?) wiki uses it. If it's good enough for C2, it's good enough for me.