feat(games): add SCP:SL support (#715)

* feat(games): add scpsl initial impl

* feat: add name

* feat: add game entry, add note

* docs: add SSL to games_list.md

* fix: remove stray debug console log

* docs: update CHANGELOG.md

protocols/scpsl.js

@@ -0,0 +1,54 @@
+import Core from './core.js'
+
+export default class scpsl extends Core {
+  constructor () {
+    super()
+    this.usedTcp = true
+  }
+
+  async run (state) {
+    const { accountId, apiKey, serverId } = this.options
+
+    const request = await this.request({
+      url: 'https://api.scpslgame.com/serverinfo.php',
+      responseType: 'json',
+      searchParams: {
+        id: accountId,
+        key: apiKey,
+        lo: true,
+        players: true,
+        list: true,
+        info: true,
+        pastebin: true,
+        version: true,
+        flags: true,
+        nicknames: true,
+        online: true
+      }
+    })
+
+    state.raw.request = request
+
+    if (!serverId) {
+      return
+    }
+
+    const servers = request?.Servers || []
+    if (!servers.length) {
+      throw new Error('No servers provided.')
+    }
+
+    const server = servers.find(server => server.ID.toString() === serverId)
+
+    if (!server) {
+      throw new Error('Couldn\'t find the given server id.')
+    }
+
+    state.version = server.Version
+    state.name = Buffer.from(server.Info, 'base64').toString()
+
+    const [numplayers, maxplayers] = server.Players.split('/').map(Number)
+    state.numplayers = numplayers
+    state.maxplayers = maxplayers
+  }
+}