feat(games): add ATS, The Cenozoic Era, VEIN and Mindustry support (#768)

* feat(games): add American Truck Simulator (ats) support

Mirrors the Euro Truck Simulator 2 configuration (valve protocol,
port 27015 with query port offset +1).

* Update .gitignore

* feat(games): add The Cenozoic Era, VEIN and Mindustry support

- The Cenozoic Era and VEIN use the Valve A2S protocol with a query
  port offset of +1 (verified live against running servers).
- Mindustry is queried via a new protocol module implementing the
  arc-net discovery ping: a two-byte UDP request (0xFE 0x01) returns
  the serialized Host struct (name, map, players, wave, version,
  vertype, gamemode, player limit, description, modeName).

* fix(games): rename thecenozoicera to tce

Satisfies the MoreThanTwoWordsMakeAcronym naming rule enforced by
the id-tests CI check: game names with more than two words require
an acronym-style id.

* Update .gitignore

* meta: restore .gitignore endline

---------

Co-authored-by: CosminPerRam <cosmin.p@live.com>

protocols/mindustry.js

@@ -0,0 +1,44 @@
+import Core from './core.js'
+
+const GAMEMODES = ['survival', 'sandbox', 'attack', 'pvp', 'editor']
+
+export default class mindustry extends Core {
+  constructor () {
+    super()
+    this.encoding = 'utf8'
+    this.byteorder = 'be'
+  }
+
+  async run (state) {
+    if (!this.options.port) this.options.port = 6567
+
+    // arc-net discovery request: triggers the Mindustry server to reply
+    // with a serialized Host struct (see Mindustry NetworkIO.writeServerData).
+    const request = Buffer.from([0xfe, 0x01])
+    const buffer = await this.udpSend(request, b => b)
+
+    const reader = this.reader(buffer)
+    const name = reader.pascalString(1)
+    const map = reader.pascalString(1)
+    const players = reader.int(4)
+    const wave = reader.int(4)
+    const version = reader.int(4)
+    const vertype = reader.pascalString(1)
+    const gamemodeId = reader.uint(1)
+    const playerLimit = reader.int(4)
+    const description = reader.pascalString(1)
+    const modeName = reader.pascalString(1)
+
+    state.name = name
+    state.map = map
+    state.password = false
+    state.numplayers = players
+    state.maxplayers = playerLimit
+    state.version = String(version)
+    state.raw.wave = wave
+    state.raw.vertype = vertype
+    state.raw.gamemode = GAMEMODES[gamemodeId] ?? String(gamemodeId)
+    state.raw.description = description
+    state.raw.modeName = modeName
+  }
+}