Add dev script to prettify save games

Useful to analyze & debug a player's save game for anomalies.

tools/README.md

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+# Tools
+
+## Pretty Save
+
+Useful to analyze a player's save game for anomalies.
+
+It decodes the save and prettifies the output. Canno be used to modify a save game directly since it drops some properties.
+
+**Usage**
+```sh
+node ./pretty-save.js 'C:\\Users\\martin\\Desktop\\bitburnerSave_1641395736_BN12x14.json' 'C:\\Users\\martin\\Desktop\\pretty.json'
+```

tools/pretty-save.js

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+/* eslint-disable @typescript-eslint/no-var-requires */
+const fs = require('fs').promises;
+const path = require('path');
+
+async function getSave(file) {
+  const data = await fs.readFile(file, 'utf8');
+
+  const save = JSON.parse(decodeURIComponent(escape(atob(data))));
+  const saveData = save.data;
+  let gameSave = {
+    PlayerSave: JSON.parse(saveData.PlayerSave),
+    CompaniesSave: JSON.parse(saveData.CompaniesSave),
+    FactionsSave: JSON.parse(saveData.FactionsSave),
+    AliasesSave: JSON.parse(saveData.AliasesSave),
+    GlobalAliasesSave: JSON.parse(saveData.GlobalAliasesSave),
+    MessagesSave: JSON.parse(saveData.MessagesSave),
+    StockMarketSave: JSON.parse(saveData.StockMarketSave),
+    SettingsSave: JSON.parse(saveData.SettingsSave),
+    VersionSave: JSON.parse(saveData.VersionSave),
+    LastExportBonus: JSON.parse(saveData.LastExportBonus),
+    StaneksGiftSave: JSON.parse(saveData.StaneksGiftSave),
+  }
+
+  const serverStrings = JSON.parse(saveData.AllServersSave);
+  const servers = {};
+  for (const [key, value] of Object.entries(serverStrings)) {
+    servers[key] = value.data;
+  }
+
+  gameSave.AllServersSave = servers;
+
+  if (saveData.AllGangsSave) {
+    gameSave.AllGangsSave = JSON.parse(saveData.AllGangsSave);
+  }
+
+  return gameSave;
+}
+
+async function main(input, output) {
+  const result = await getSave(input)
+  await fs.writeFile(output, JSON.stringify(result, null, 2));
+  return result
+}
+
+const input = path.resolve(process.argv[2]);
+const output = path.resolve(process.argv[3]);
+
+console.log(`Input: ${input}`);
+console.log(`Output: ${output}`);
+
+main(input, output).then(() => {
+  console.log('Done!');
+})