Extract SemanticVersion into its own crate (#9956)

This PR extracts the `SemanticVersion` out of `util` and into its own
`SemanticVersion` crate.

This allows for making use of `SemanticVersion` without needing to pull
in some of the heavier dependencies included in the `util` crate.

As part of this the public API for `SemanticVersion` has been tidied up
a bit.

Release Notes:

- N/A

crates/extension/src/extension_store.rs

@@ -33,6 +33,7 @@ use language::{
     QUERY_FILENAME_PREFIXES,
 };
 use node_runtime::NodeRuntime;
+use semantic_version::SemanticVersion;
 use serde::{Deserialize, Serialize};
 use settings::Settings;
 use std::str::FromStr;
@@ -44,7 +45,6 @@ use std::{
 };
 use theme::{ThemeRegistry, ThemeSettings};
 use url::Url;
-use util::SemanticVersion;
 use util::{
     http::{AsyncBody, HttpClient, HttpClientWithUrl},
     maybe,