Enabled the @typescript-eslint/no-unused-expressions eslint rule (#2014)

## Description:

- Fixes #1790
- Fixed the codebase:
- expressions short-circuiting with `&&` changed to proper `if`
statements
  - `A instanceof B;` expressions now emit warnings

## Please complete the following:
- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:
michal7952

---------

Co-authored-by: Evan <evanpelle@gmail.com>

src/client/graphics/layers/EventsDisplay.ts

@@ -1051,7 +1051,7 @@ export class EventsDisplay extends LitElement implements Layer {
                                 ? this.renderButton({
                                     content: this.getEventDescription(event),
                                     onClick: () => {
-                                      event.focusID &&
+                                      if (event.focusID)
                                         this.emitGoToPlayerEvent(event.focusID);
                                     },
                                     className: "text-left",
@@ -1060,7 +1060,7 @@ export class EventsDisplay extends LitElement implements Layer {
                                   ? this.renderButton({
                                       content: this.getEventDescription(event),
                                       onClick: () => {
-                                        event.unitView &&
+                                        if (event.unitView)
                                           this.emitGoToUnitEvent(
                                             event.unitView,
                                           );

src/client/graphics/layers/StructureIconsLayer.ts

@@ -255,7 +255,9 @@ export class StructureIconsLayer implements Layer {
           this.potentialUpgrade.iconContainer.filters = [];
           this.potentialUpgrade.dotContainer.filters = [];
         }
-        this.ghostUnit?.container && (this.ghostUnit.container.filters = []);
+        if (this.ghostUnit?.container) {
+          this.ghostUnit.container.filters = [];
+        }
 
         if (!this.ghostUnit) return;