Add python-cwcwidth to depends

Description:

PO-file operations using the class loader translate/storage/po.py will default to use translate/storage/pypo.py if the environment variable USECPO is not set (which is not by default). Setting USECPO=1 or 2 will use internal implementation not requiring dependency. Without USECPO, that pypo.py tries to import cwcwidth (python-cwcwidth package at official repositories).

Not setting the environment variable USECPO causes the tools to fail raising ModuleNotFoundError.

Additional info:

• package version(s): translate-toolkit 3.14.5-1
• config and/or log files:
• link to upstream bug report, if any:

Steps to reproduce:

1. po2tmx -i path/to/input/file.po -o path/to/output/file.tmx
2. See raised exception:

Traceback (most recent call last):
  File "/usr/bin/po2tmx", line 5, in <module>
    from translate.convert.po2tmx import main
  File "/usr/lib/python3.13/site-packages/translate/convert/po2tmx.py", line 30, in <module>
    from translate.storage import po, tmx
  File "/usr/lib/python3.13/site-packages/translate/storage/po.py", line 42, in <module>
    from translate.storage.pypo import *  # noqa: F403
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/translate/storage/pypo.py", line 34, in <module>
    from cwcwidth import wcswidth, wcwidth
ModuleNotFoundError: No module named 'cwcwidth'

added priority3-normal severity4-low statusunconfirmed labels

assigned to @freswa, @toolybird, and @gromit

changed title from Adds python-cwcwidth to depends to Add python-cwcwidth to depends

$ pip check
translate-toolkit 3.14.5 requires cwcwidth, which is not installed.

cc @arojas (who kindly updated it to version 3.14.x which introduced the new dep).

added scopebug statusconfirmed labels and removed statusunconfirmed label

assigned to @jlichtblau and unassigned @freswa, @toolybird, and @gromit

closed with commit c199aa6d