utils: add RangeSet early implementation based on RBTree

utils/misc/Cargo.lock

@@ -8,10 +8,29 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
 
+[[package]]
+name = "intrusive-collections"
+version = "0.9.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "189d0897e4cbe8c75efedf3502c18c887b05046e59d28404d4d8e46cbc4d1e86"
+dependencies = [
+ "memoffset",
+]
+
+[[package]]
+name = "memoffset"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "488016bfae457b036d996092f6cb448677611ce4449e970ceaf42695203f218a"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "misc"
 version = "0.1.0"
 dependencies = [
+ "intrusive-collections",
  "num-traits",
 ]