docs, prompts, hive-forge: stop handing readers the renamed verbs

docs/tools/forge.md already listed the nine renamed verbs as removed, then
used them ~30 more times in pasteable blocks. Sweeps every occurrence a
reader would type, including three runtime messages that told the user to
run a verb the same binary rejects.

The renamed-verb list itself keeps the old names; it is what documents them.

Refs #4155

hive-forge/src/verbs/issue_create.rs

@@ -1,4 +1,4 @@
-//! `issue-create --title <t> [body sources] [--assignee <u>]
+//! `issue create --title <t> [body sources] [--assignee <u>]
 //! [--label <name>]... [repo]` — create an issue. Prints the issue URL.
 
 use anyhow::Result;
@@ -46,7 +46,7 @@ pub fn run(client: &Client, args: Args) -> Result<()> {
     let body = body::resolve_required(
         args.body.as_deref(),
         args.body_file.as_deref(),
-        "issue-create",
+        "issue create",
     )?;
     let (owner, name) = client.owner_repo()?;
     let label_ids = if args.labels.is_empty() {