Fix obvious typos (#2585)

## Summary
- fix obvious spelling typos flagged by codespell across docs, tests,
comments
- no functional changes

## Testing
- pre-commit hooks (eslint/prettier) ran during commit

src/core/game/PlayerImpl.ts

@@ -398,7 +398,7 @@ export class PlayerImpl implements Player {
     if (this.isDisconnected() || other.isDisconnected()) {
       // Disconnected players are marked as not-friendly even if they are allies,
       // so we need to return early if either player is disconnected.
-      // Otherise we could end up sending an alliance request to someone
+      // Otherwise we could end up sending an alliance request to someone
       // we are already allied with.
       return false;
     }

src/core/game/UserSettings.ts

@@ -75,7 +75,7 @@ export class UserSettings {
 
   focusLocked() {
     return false;
-    // TODO: renable when performance issues are fixed.
+    // TODO: re-enable when performance issues are fixed.
     this.get("settings.focusLocked", true);
   }