paths: Replace lazy_static! with OnceLock (#13213)

This PR replaces the `lazy_static!` usages in the `paths` crate with
`OnceLock` from the standard library.

This allows us to drop the `lazy_static` dependency from this crate.

The paths are now exposed as accessor functions that reference a private
static value.

Release Notes:

- N/A

crates/cli/src/main.rs

@@ -220,7 +220,7 @@ mod linux {
         }
 
         fn launch(&self, ipc_url: String) -> anyhow::Result<()> {
-            let sock_path = paths::SUPPORT_DIR.join(format!("zed-{}.sock", *RELEASE_CHANNEL));
+            let sock_path = paths::support_dir().join(format!("zed-{}.sock", *RELEASE_CHANNEL));
             let sock = UnixDatagram::unbound()?;
             if sock.connect(&sock_path).is_err() {
                 self.boot_background(ipc_url)?;