@yuvipanda I'm guessing that Evernote is the closest thing to this vision I've had for decades, but I think what I've always wanted (but never badly enough to bother building) was the thing you've roughly described in your post. My mental codename for this project I never even started was always Heap (before heap.io ever existed).
My first inklings toward this sort of tooling emerged when the first real versions of Gmail were released. I started shoving all sorts of weird data in there because it was easy to email a thing to myself and the search was medium-pretty-good. "Oh, that was harder to find than I thought." :Reply-to-email-to-self with some keywords smashed in haphazardly: It was certainly good enough and it was free-er or as-free as Evernote so I never bothered paying money for a thing I barely trust to proprietary software anyway.
At some point I realized that what I wanted was the digital equivalent of Samus Aran's Locker: https://metroid.fandom.com/wiki/The_Locker ...just a place to shove all my