library: use yt-dlp as a global standby-provider

[cosven]

To use this feature, you should

1. instance yt-dlp pip install yt-dlp
2. setup config in ~/.fuorc, for example

config.YTDL_RULES = [{'name': 'match_source',
                      'pattern': 'ytmusic',
                      'http_proxy': 'http://127.0.0.1:7890'},]

[coveralls]

Pull Request Test Coverage Report for Build 9650720480

Details

• 25 of 61 (40.98%) changed or added relevant lines in 4 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.06%) to 55.166%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
feeluown/app/app.py	4	6	66.67%
feeluown/library/library.py	8	19	42.11%
feeluown/library/ytdl.py	11	34	32.35%

Files with Coverage Reduction	New Missed Lines	%
feeluown/task.py	1	92.41%

Totals
Change from base Build 9367665860:	-0.06%
Covered Lines:	9841
Relevant Lines:	17839

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9691076479

Details

• 38 of 108 (35.19%) changed or added relevant lines in 5 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 55.103%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
feeluown/library/provider_protocol.py	3	4	75.0%
feeluown/app/app.py	4	6	66.67%
feeluown/library/library.py	15	32	46.88%
feeluown/library/ytdl.py	14	64	21.88%

Files with Coverage Reduction	New Missed Lines	%
feeluown/task.py	1	92.41%

Totals
Change from base Build 9367665860:	-0.1%
Covered Lines:	9853
Relevant Lines:	17881

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9729470175

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 38 of 108 (35.19%) changed or added relevant lines in 5 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 55.103%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
feeluown/library/provider_protocol.py	3	4	75.0%
feeluown/app/app.py	4	6	66.67%
feeluown/library/library.py	15	32	46.88%
feeluown/library/ytdl.py	14	64	21.88%

Files with Coverage Reduction	New Missed Lines	%
feeluown/task.py	1	92.41%

Totals
Change from base Build 9367665860:	-0.1%
Covered Lines:	9853
Relevant Lines:	17881

---

💛 - Coveralls