feat: allow explicit sw de-registering + timebomb

[SgtPooki]

I will be deploying these changes to sw.sgtpooki.com so it can be used for testing

[SgtPooki]

FYI that the latest changes, i.e. fe32830 (#100), except that the timebomb is set to 30seconds (see below) have been deployed to https://sw.sgtpooki.com

╰─ ✔ ❯ git add -p                                                                                                                                     3.73   24.4G   52%   100%  ─╯
Alias tip: g add -p
diff --git a/src/sw.ts b/src/sw.ts
index f859e19..8ec8a02 100644
--- a/src/sw.ts
+++ b/src/sw.ts
@@ -291,7 +291,7 @@ async function isTimebombExpired (): Promise<boolean> {
   firstInstallTime = firstInstallTime ?? await getInstallTimestamp()
   const now = Date.now()
   // max life (for now) is 24 hours
-  const timebomb = 24 * 60 * 60 * 1000
+  const timebomb = 30 * 1000
   return now - firstInstallTime > timebomb
 }

This should help with testing. See a demo below:

2024-03-12.at.15.54.57.-.Coffee.Galliform.mp4

[SgtPooki]

self review & local testing of cache && 10sec timebomb