feat(theme): add tool_output color to themes

- Added a `tool_output` color to the `Theme` struct.
- Updated all built-in themes to include the new color.
- Modified the TUI to use the `tool_output` color for rendering tool output.

crates/owlen-core/Cargo.toml

@@ -39,6 +39,7 @@ sqlx = { workspace = true }
 duckduckgo = "0.2.0"
 reqwest = { workspace = true, features = ["default"] }
 reqwest_011 = { version = "0.11", package = "reqwest" }
+path-clean = "1.0"
 
 [dev-dependencies]
 tokio-test = { workspace = true }