feat!: remove the deprecated --install-from flag and .install remote form

--install <git-url|name> is the single entry point for remote installs
and updates; the unified .install dispatch likewise replaces
.install remote. Flag completion for .install now applies to the
unified form.

src/config/mod.rs

@@ -33,8 +33,7 @@ pub use self::app_state::AppState;
 pub use self::bundles::list_installed_bundles;
 pub use self::input::Input;
 pub use self::install_remote::{
-    install_or_update, install_or_update_from_repl_args, install_remote,
-    install_remote_from_repl_args, uninstall_bundle, update_bundle,
+    install_or_update, install_or_update_from_repl_args, uninstall_bundle, update_bundle,
 };
 pub use self::macro_policy::{
     MacroAllowlistLevel, MacroPolicy, MacroSource, MacroState, RESERVED_MACRO_NAMES, ResolvedMacro,