fix(commands): init site context before setup-chrome and fix chrome typo

[Packeting1]

• Initialize site context for each target site before running setup-chrome
• Commit and clean up connections after running setup
• Fix typo in command handler name (setup_chorme → setup_chrome)

Resolves: Error occurs when using the bench setup-chorme command.

frappe@906c010f52ca:~/frappe-bench$ bench --site site1.local setup-chro
me
Chromium is already set up at /home/frappe/frappe-bench/chromium/chrome-linux/headless_shell
Traceback (most recent call last):
File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py", line 48, in invoke
return super().invoke(ctx)
~~~~~~~~~~~~~~^^^^^
File "/home/frappe/frappe-bench/env/lib/python3.14/site-packages/click/core.py", line 1873, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "/home/frappe/frappe-bench/env/lib/python3.14/site-packages/click/core.py", line 1269, in invoke
return ctx.invoke(self.callback, **ctx.params)
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/frappe/frappe-bench/env/lib/python3.14/site-packages/click/core.py", line 824, in invoke
return callback(*args, **kwargs)
File "/home/frappe/frappe-bench/apps/print_designer/print_designer/commands/__init__.py", line 8, in setup_chorme
setup_chromium()
~~~~~~~~~~~~~~^^
File "/usr/lib/python3.14/contextlib.py", line 85, in inner
return func(*args, **kwds)
File "/home/frappe/frappe-bench/apps/print_designer/print_designer/install.py", line 62, in setup_chromium
add_pdf_generator_option()
~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/home/frappe/frappe-bench/apps/print_designer/print_designer/install.py", line 322, in add_pdf_generator_option
set_pdf_generator_option("add")
~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
File "/home/frappe/frappe-bench/apps/print_designer/print_designer/install.py", line 326, in set_pdf_generator_option
field = frappe.get_meta("Print Format").get_field("pdf_generator")
~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
File "/home/frappe/frappe-bench/apps/frappe/frappe/model/meta.py", line 85, in get_meta
and (meta := frappe.client_cache.get_value(f"doctype_meta::{doctype}"))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'get_value'

'NoneType' object has no attribute 'get_value'