[codex] Remove codex-core config type shim (#16529)

## Why

This finishes the config-type move out of `codex-core` by removing the
temporary compatibility shim in `codex_core::config::types`. Callers now
depend on `codex-config` directly, which keeps these config model types
owned by the config crate instead of re-expanding `codex-core` as a
transitive API surface.

## What Changed

- Removed the `codex-rs/core/src/config/types.rs` re-export shim and the
`core::config::ApprovalsReviewer` re-export.
- Updated `codex-core`, `codex-cli`, `codex-tui`, `codex-app-server`,
`codex-mcp-server`, and `codex-linux-sandbox` call sites to import
`codex_config::types` directly.
- Added explicit `codex-config` dependencies to downstream crates that
previously relied on the `codex-core` re-export.
- Regenerated `codex-rs/core/config.schema.json` after updating the
config docs path reference.

codex-rs/core/src/connectors.rs

@@ -26,14 +26,14 @@ use tracing::warn;
 
 use crate::codex::INITIAL_SUBMIT_ID;
 use crate::config::Config;
-use crate::config::types::AppToolApproval;
-use crate::config::types::AppsConfigToml;
-use crate::config::types::ToolSuggestDiscoverableType;
 use crate::config_loader::AppsRequirementsToml;
 use crate::mcp::McpManager;
 use crate::plugins::AppConnectorId;
 use crate::plugins::PluginsManager;
 use crate::plugins::list_tool_suggest_discoverable_plugins;
+use codex_config::types::AppToolApproval;
+use codex_config::types::AppsConfigToml;
+use codex_config::types::ToolSuggestDiscoverableType;
 use codex_features::Feature;
 use codex_login::AuthManager;
 use codex_login::CodexAuth;