fix(skills-hub): stop ellipsis-truncating the Identifier column (#33810)

`hermes skills search` rendered the Identifier column with the default
overflow behaviour, so long slugs (notably browse-sh — every browse-sh
skill ends in a `-XXXXXX` hash that's part of the identifier) were cut
to `browse-sh/weathe…`. Users copied the visible string into
`hermes skills install` and got a not-found error because the hash was
gone.

Set overflow="fold" on the Identifier column in both search tables
(`do_search` and the `_resolve_short_name` multi-match table) so long
slugs wrap onto a second line instead of getting eaten. Also add a
`--json` flag to `hermes skills search` (and the `/skills search`
slash variant) for scripting — emits a list of {name, identifier,
source, trust_level, description} objects with the full identifier,
which is the right shape for copy-paste pipelines too.

Closes #33674.

hermes_cli/main.py

@@ -12656,6 +12656,11 @@ Examples:
         ],
     )
     skills_search.add_argument("--limit", type=int, default=10, help="Max results")
+    skills_search.add_argument(
+        "--json",
+        action="store_true",
+        help="Output JSON instead of a table (full identifiers, scripting-friendly)",
+    )
 
     skills_install = skills_subparsers.add_parser("install", help="Install a skill")
     skills_install.add_argument(