feat: mem slash commands (#11569)

Add 2 slash commands for memories:
* `/m_drop` delete all the memories
* `/m_update` update the memories with phase 1 and 2

codex-rs/tui/src/slash_command.rs

@@ -46,6 +46,11 @@ pub enum SlashCommand {
     Clean,
     Personality,
     TestApproval,
+    // Debugging commands.
+    #[strum(serialize = "debug-m-drop")]
+    MemoryDrop,
+    #[strum(serialize = "debug-m-update")]
+    MemoryUpdate,
 }
 
 impl SlashCommand {
@@ -70,6 +75,8 @@ impl SlashCommand {
             SlashCommand::Statusline => "configure which items appear in the status line",
             SlashCommand::Ps => "list background terminals",
             SlashCommand::Clean => "stop all background terminals",
+            SlashCommand::MemoryDrop => "DO NOT USE",
+            SlashCommand::MemoryUpdate => "DO NOT USE",
             SlashCommand::Model => "choose what model and reasoning effort to use",
             SlashCommand::Personality => "choose a communication style for Codex",
             SlashCommand::Plan => "switch to Plan mode",
@@ -118,7 +125,9 @@ impl SlashCommand {
             | SlashCommand::Experimental
             | SlashCommand::Review
             | SlashCommand::Plan
-            | SlashCommand::Logout => false,
+            | SlashCommand::Logout
+            | SlashCommand::MemoryDrop
+            | SlashCommand::MemoryUpdate => false,
             SlashCommand::Diff
             | SlashCommand::Rename
             | SlashCommand::Mention