Fixed issue where the code assumes ~/.FeelUOwn/ exists when copying png files

[Torxed]

When on a fresh install as a system library (usually via OS packaging), the following will happen:

anton@hotlap ~ $ feeluown genicon
Generate icon, then you can see app on desktop.
Traceback (most recent call last):
  File "/usr/bin/feeluown", line 33, in <module>
    sys.exit(load_entry_point('feeluown==3.8.12', 'console_scripts', 'feeluown')())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/feeluown/entry_points/run.py", line 27, in run
    return run_cli(args)
           ^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/feeluown/entry_points/run_cli.py", line 6, in run_cli
    aio.run(climain(args))
  File "/usr/lib/python3.11/asyncio/runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/asyncio/base_events.py", line 653, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/feeluown/cli/cli.py", line 221, in climain
    generate_icon()
  File "/usr/lib/python3.11/site-packages/feeluown/cli/install.py", line 126, in generate_icon
    gen_for_win_linux()
  File "/usr/lib/python3.11/site-packages/feeluown/cli/install.py", line 78, in gen_for_win_linux
    shutil.copy(from_icon, to_icon)
  File "/usr/lib/python3.11/shutil.py", line 419, in copy
    copyfile(src, dst, follow_symlinks=follow_symlinks)
  File "/usr/lib/python3.11/shutil.py", line 258, in copyfile
    with open(dst, 'wb') as fdst:
         ^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/home/anton/.FeelUOwn/feeluown.png'

The code assumes ~/.FeelUOwn/ exists, which is not true on a fresh machine with a fresh install of feeluown.

This PR should correct this.

[cosven]

LGTM

[coveralls]

Pull Request Test Coverage Report for Build 5586340058

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.004%) to 59.593%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
feeluown/cli/install.py	0	1	0.0%

Files with Coverage Reduction	New Missed Lines	%
feeluown/cli/install.py	1	22.39%

Totals
Change from base Build 5578444668:	-0.004%
Covered Lines:	8601
Relevant Lines:	14433

---

💛 - Coveralls