Documentation: Release v3.0.0-alpha.8

[dave42w]

Description

I struggled to find the Rust sdk for this release. I couldn't find any documentation about where it is released to (or if I need to build it from source)

1. Please add a note to https://surrealdb.com/releases#v3-0-0-alpha-8 to say where to find the sdks
2. Please add a brief README to https://github.com/surrealdb/surrealdb/releases/tag/v3.0.0-alpha.8 listing the urls for the sdks. At the same time it would make sense to add the same readme to the binary server downloads eg surreal-v3.0.0-alpha.8.linux-amd64.tgz
3. It seems that some Alpha rust sdk releases in the past were to https://crates.io/crates/surrealdb-alpha please update the description of that to link to https://crates.io/crates/surrealdb (mentioning to click the versions tab to see Alpha and Beta releases).
4. At least at the moment docs.rs has failed to build the documentation for both surrealdb-2.3.9 and surrealdb-3.0.0-alpha.8

I would suggest that the README for 1&2 above could be written so it might not even need to change for future Alpha and Beta releases eg

README

SurrealDB development release

• Release Notes: https://surrealdb.com/releases
• SurrealDB server binaries: https://github.com/surrealdb/surrealdb/releases
• Rust client sdk: https://crates.io/crates/surrealdb/versions
• Python ...
• ...

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