chore: bump version to 1.1.8

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: korjwl1

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "toki"
-version = "1.1.7"
+version = "1.1.8"
 edition = "2021"
 description = "AI CLI tool token usage tracker module"
 license = "FSL-1.1-Apache-2.0"