Push smithy-rs to Maven Central

[rcoh]

• Mark APIs as @SmithyInternalApi
• Set up artifact on Maven Central
• Set up GitHub action to push to maven central on tags
• Determine credentials management strategy
• Versioning strategy

[jnicholls]

Is there a written procedure for using smithy-rs as a gradle plugin? I don't see the client or server codegen's published to maven central. How does one use smithy-rs in their own project? Thanks in advance @rcoh

[rcoh]

Currently folks usually use it as a git submodule I think. I think @crisidev has an example somewhere

[nated0g]

Having smithy-rs in maven central would significantly reduce the barrier to entry to actually using it