feat(cli): added omp share command for saved sessions

Shares a saved session by id prefix or .jsonl path without launching the
agent - same encrypted upload, store selection, and share.redactSecrets
handling as the /share slash command.

packages/coding-agent/src/cli/command-help.ts

@@ -72,6 +72,10 @@ export const sayHelp = {
 
 export const searchHelp = { description: "Test web search providers" } satisfies CommandMetadata;
 
+export const shareHelp = {
+	description: "Share a saved session via an encrypted link (same as /share)",
+} satisfies CommandMetadata;
+
 export const setupHelp = {
 	description: "Run onboarding setup or install dependencies for optional features",
 } satisfies CommandMetadata;