ESLint parity with the Browsertrix repo (#288)

This copies the rules from the Browsertrix repo, and uses
[`suppress-eslint-errors`](https://www.npmjs.com/package/suppress-eslint-errors)
to suppose the violations. I'll take a pass at cleaning this up at some
point in the future, and let's do our best to address these in the
future as we come across them :)

This'll help ensure new code being added to this repo is held to the
same standard as code in Browsertrix's frontend.

src/embed-receipt.ts

@@ -319,16 +319,20 @@ export class RWPEmbedReceipt extends LitElement {
                   class="has-text-black"
                   target="_blank"
                   href="https://github.com/webrecorder/replayweb.page"
-                  >${this.appLogo
-                    ? html`
-                        <fa-icon
-                          class="menu-logo mr-1"
-                          size="1.0rem"
-                          aria-hidden="true"
-                          .svg=${this.appLogo}
-                        ></fa-icon>
-                      `
-                    : nothing}
+                  >${
+                    // TODO: Fix this the next time the file is edited.
+                    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+                    this.appLogo
+                      ? html`
+                          <fa-icon
+                            class="menu-logo mr-1"
+                            size="1.0rem"
+                            aria-hidden="true"
+                            .svg=${this.appLogo}
+                          ></fa-icon>
+                        `
+                      : nothing
+                  }
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                 </a>
               </span>