Have relative links link to notes repo?

[bobwhitelock]

Have relative markdown links (e.g. [some/path.md](/some/path.md) fall back to linking to configured notes repo on GitHub, rather than relative to todotxt-ui site? Could also do the same/instead for just normal file paths, e.g. some/path.md (or maybe <some/path.md>) - might be harder to detect, but easier to read