inline_completion_button: Show the initial usage data from the server (#29952)

This PR updates the usage indicator for edit predictions to show the
initial usage data returned from the server.

Release Notes:

- N/A

Cargo.lock

@@ -7296,6 +7296,7 @@ dependencies = [
  "lsp",
  "paths",
  "project",
+ "proto",
  "regex",
  "serde_json",
  "settings",
@@ -7303,6 +7304,7 @@ dependencies = [
  "telemetry",
  "theme",
  "ui",
+ "util",
  "workspace",
  "workspace-hack",
  "zed_actions",