Adapt RocksDB 11.1.1 & Add Windows MSYS2 workflow

[quadcpu]

./rocksdb-upgrade.md is for upgrading with latest rocksdb tag version using AI.

Adding ./win-build.md and msys2 workflow so that people wouldn't get lost supporting windows static builds.

[quadcpu]

cc @linxGnu

[linxGnu]

Hi @quadcpu, thank for your contribution.

It takes time for me to review things. However, it looks to me that your PR lacking many useful feature, such as: rocksdb_block_based_options_set_index_block_search_type

Could you please add them?

[quadcpu]

@linxGnu Hello,

I'm still a fairly basic grocksdb / rocksdb user — my only use case is storing key-value data locally — so I have very little knowledge of RocksDB's advanced features.

That said, I've added the features available in newer versions by referencing another RocksDB wrapper, rust-rocksdb, along with the relevant RocksDB changelogs.

The file ./CHANGES-v11.1.1-features.md should serve as a guide for what I've added. Please note it may contain mistakes, as I don't fully understand all of these features yet.