Implements highlighting of shortlinks like cl/123, or b/123.
Highlighting works by replacing the input Markdown using a simple
regular expression replacement.
We also considered parsing and replacing these links in the Markdown
AST, but it would have been significantly more complex (due to arena
allocation) for little upside and no obvious performance benefit.
Change-Id: I53f03fb17491046d89d0b7f605929571c11ee9a8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3082
Tested-by: BuildkiteCI
Reviewed-by: eta <eta@theta.eu.org>
Splits `main.rs` into `lib.rs` and `bin/cheddar.rs`, which enables
reuse of cheddar's rendering logic in other Rust applications.
Change-Id: Ifd1a44a8d1620c595550a0a497a25b0563e917ca
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3060
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
