Regarding the release of YPSH v11

[Nercone]

I'm planning many changes for YPSH v11, but during the process of making these changes, some features that were available in v10 are breaking.
As a result, I'm considering rebuilding it from v10.
The release of YPSH v11 may not be possible for at least three years.

Known Issues:

• When attempting myDict["a"] = "hello", an error occurs if the key "a" is not set, making the assignment meaningless. (Discovered: local, uncommitted, around 2025-11-08 19:10 JST, sha256:15949442247242fb1a2aeebb506cabc427ad235c2015a478065673893d47c855)