Support for comment nesting with a tree structure

Cargo.lock

@@ -577,6 +577,12 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "either"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fcaabb2fef8c910e7f4c7ce9f67a1283a1715879a7c230ca9d6d1ae31f16d91"
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.32"
@@ -1322,6 +1328,15 @@ dependencies = [
  "phf 0.11.2",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1c173a5686ce8bfa551b3563d0c2170bf24ca44da99c7ca4bfdab5418c3fe57"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.6"
@@ -1444,6 +1459,7 @@ version = "0.2.0"
 dependencies = [
  "chrono",
  "html2pango",
+ "itertools",
  "lemmy_api_common",
  "markdown",
  "mime_guess",