feat: new parser for mention everything (#411)

* feat: implement custom parser for mentions

* feat: handle backticks in codeblocks and escapes

* chore: remove fancy-regex

* fix: dont serialise empty role mentions

* chore: cleanup role mentions logic

* chore: update lockfile

* fix: actually use everyone and online mentions from content

* fix: broken merge

---------

Signed-off-by: Zomatree <me@zomatree.live>

crates/core/parser/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "revolt-parser"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+logos = { version = "*" }