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.ts

@@ -103,6 +103,8 @@ class Embed extends LitElement {
       await this.swmanager.register();
       this.inited = true;
     } catch (e) {
+      // TODO: Fix this the next time the file is edited.
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
       this.errorMessage = this.swmanager.renderErrorReport(this.logo);
     }
   }
@@ -123,6 +125,8 @@ class Embed extends LitElement {
         return;
       }
 
+      // TODO: Fix this the next time the file is edited.
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
       const currHash = new URLSearchParams(event.data);
       const url = new URL(window.location.href);
       url.hash = "#" + currHash.toString();
@@ -136,6 +140,8 @@ class Embed extends LitElement {
         "The noSandbox flag is deprecated. ReplayWeb.page does not add a sandbox by default. To enable sandboxing, use 'sandbox' flag instead. This may result in PDFs not loading and pages opening in new windows, but may be more secure in some situations",
       );
     }
+    // TODO: Fix this the next time the file is edited.
+    // eslint-disable-next-line @typescript-eslint/no-floating-promises
     this.doRegister();
 
     window.addEventListener("message", (event) => this.handleMessage(event));
@@ -156,12 +162,16 @@ class Embed extends LitElement {
     if (
       // @ts-expect-error - TS2339 - Property 'GestureEvent' does not exist on type 'Window & typeof globalThis'.
       window.GestureEvent !== undefined &&
+      // TODO: Fix this the next time the file is edited.
+      // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
       window.SharedWorker === undefined
     ) {
       this.noWebWorker = true;
     }
 
     // if no storage manager or estimate, don't cache
+    // TODO: Fix this the next time the file is edited.
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (!navigator.storage?.estimate) {
       this.noCache = true;
     }
@@ -189,6 +199,8 @@ class Embed extends LitElement {
   }
 
   mergeConfigs() {
+    // TODO: Fix this the next time the file is edited.
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (!this.customConfig) {
       return this.config;
     }
@@ -217,6 +229,8 @@ class Embed extends LitElement {
         this.source = this.src;
       }
 
+      // TODO: Fix this the next time the file is edited.
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
       const source = new URL(this.source, document.baseURI);
 
       const config = this.mergeConfigs();
@@ -353,6 +367,8 @@ class Embed extends LitElement {
       this.reloadCount <= 2
     ) {
       this.reloadCount++;
+      // TODO: Fix this the next time the file is edited.
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-return
       setTimeout(() => win.location.reload(), 100);
       return;
     }
@@ -375,6 +391,8 @@ async function main() {
   customElements.define("replay-web-page", Embed);
 }
 
+// TODO: Fix this the next time the file is edited.
+// eslint-disable-next-line @typescript-eslint/no-floating-promises
 main();
 
 export { Embed };