Add BPO Folder

[poojaranjan]

Add blob schedule and BPO upgrade parameter documentation to increase visibility into BPO progress, similar to how other Ethereum network upgrades are tracked.

[taxmeifyoucan]

I see this have been open for a while, I guess there are not many strong feelings for or against.

I am wondering, are there going to be many fork independent BPOs that would warrant this?

It feels like a bit too much overhead because I don't expect blobs widely changing all the time. For example if there were only BPOs after and maybe one fork in the future, not necessary to have a dedicated folder and it could live in more simple format under the fork. Just trying to keep the repo as lean as we can

[poojaranjan]

Thanks for reviewing. Totally agree on keeping the repo lean.

That said, this PR is primarily informational and aimed at improving public information. Similar to other upgrade folders, it provides a clear entry point with pointers to relevant specs and discussions, rather than adding ongoing overhead.

Even if we don’t expect many independent BPO forks, having a dedicated place helps with discoverability and serves as a useful historical reference for how Blob Parameter Only changes were coordinated.

Given this, I’d suggest merging the PR for its value as a public-facing reference. We can always revisit and simplify if the structure proves unnecessary over time.