ruby: Bump to v0.1.0 (#15855)

ruby: Bump extension version to v0.1.0 Why not v0.0.9? I think the Ruby
extension is mature, and it's time to release the first minor version.
But I am totally OK with changing it to 0.0.9.

Included changes:

- https://github.com/zed-industries/zed/pull/15778
- https://github.com/zed-industries/zed/pull/15762
- https://github.com/zed-industries/zed/pull/15110
- https://github.com/zed-industries/zed/pull/15297

Release Notes:

- N/A

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Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>