feat: add support for file_opener option in Rust, similiar to #911 (#957)

This ports the enhancement introduced in
https://github.com/openai/codex/pull/911 (and the fixes in
https://github.com/openai/codex/pull/919) for the TypeScript CLI to the
Rust one.

codex-rs/tui/Cargo.toml

@@ -22,11 +22,14 @@ codex-core = { path = "../core" }
 codex-common = { path = "../common", features = ["cli", "elapsed"] }
 color-eyre = "0.6.3"
 crossterm = { version = "0.28.1", features = ["bracketed-paste"] }
+lazy_static = "1"
 mcp-types = { path = "../mcp-types" }
+path-clean = "1.0.1"
 ratatui = { version = "0.29.0", features = [
     "unstable-widget-ref",
     "unstable-rendered-line-info",
 ] }
+regex = "1"
 serde_json = "1"
 shlex = "1.3.0"
 strum = "0.27.1"
@@ -44,4 +47,7 @@ tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
 tui-input = "0.11.1"
 tui-markdown = "0.3.3"
 tui-textarea = "0.7.0"
-uuid = { version = "1" }
+uuid = "1"
+
+[dev-dependencies]
+pretty_assertions = "1"