Syntax highlighting working. Getting started on markdown support

Cargo.lock

@@ -3419,6 +3419,7 @@ dependencies = [
  "lsp",
  "parking_lot",
  "postage",
+ "pulldown-cmark",
  "rand 0.8.3",
  "regex",
  "rocksdb",
@@ -3555,6 +3556,17 @@ dependencies = [
  "prost 0.9.0",
 ]
 
+[[package]]
+name = "pulldown-cmark"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34f197a544b0c9ab3ae46c359a7ec9cbbb5c7bf97054266fecb7ead794a181d6"
+dependencies = [
+ "bitflags",
+ "memchr",
+ "unicase",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.9"