lidarr: flac2mp3 release 2.4.3

[TheCaptain989]

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• I have read the contributing guideline and understand that I have made the correct modifications

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Description:

• Updated README
• Updated graphic assets
• Added short usage function
• Rewrote binary dependency check
• Change shell commands to eval
• Removed redirection of stderr on most commands
• Removed redundant -r jq option when -j option was also present

Benefits of this PR and context:

Primarily documentation.

How Has This Been Tested?

Separate Docker development environment, with custom test script plus manual testing.
Functional changes deployed from development repo and running in personal environment.

Source / References:

None.

[LinuxServer-CI]

PR build pushed to ghcr.io/linuxserver/mods:pull_request_1017