Add twitch_common crate

crates/lib/twitch_common/Cargo.toml

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+[package]
+name = "twitch_common"
+edition = "2018"
+version = "0.0.1"
+authors = [
+    "Brandon Thomas <bt@brand.io>",
+    "Brandon Thomas <echelon@gmail.com>",
+]
+publish = false
+
+[lib]
+name = "twitch_common"
+path = "src/lib.rs"
+
+[dependencies]
+
+# Internal
+container_common = { path = "../container_common" }
+
+# External
+anyhow = "1.0.40"
+once_cell = "1.9.0"

crates/lib/twitch_common/src/cheers.rs

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+use once_cell::sync::Lazy;
+use std::collections::HashSet;
+
+/// These cheer emotes always combine with a number
+/// This list seems pretty comprehensive
+/// https://github.com/nossebro/TwitchPubSubMirror/blob/master/TwitchPubSubMirror_StreamlabsSystem.py
+
+static TWITCH_CHEERS : Lazy<HashSet<String>> = Lazy::new(|| {
+  let cheers = vec![
+    "Cheer",
+    "DoodleCheer",
+    "BibleThump",
+    "cheerwhal",
+    "Corgo",
+    "uni",
+    "ShowLove",
+    "Party",
+    "SeemsGood",
+    "Pride",
+    "Kappa",
+    "FrankerZ",
+    "HeyGuys",
+    "DansGame",
+    "EleGiggle",
+    "TriHard",
+    "Kreygasm",
+    "4Head",
+    "SwiftRage",
+    "NotLikeThis",
+    "FailFish",
+    "VoHiYo",
+    "PJSalt",
+    "MrDestructoid",
+    "bday",
+    "RIPCheer",
+    "Shamrock",
+    "BitBoss",
+    "Streamlabs",
+    "Muxy",
+    "HolidayCheer"
+  ];
+  let mut s = HashSet::new();
+  for cheer in cheers.into_iter() {
+    s.insert(cheer.to_string());
+  }
+  s
+});

crates/lib/twitch_common/src/lib.rs

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+pub mod cheers;