Create scripts/lb-wrapper.greedy à la 'yt-dlp dl --format-sort size' [and refactor /usr/local/bin/lb-wrapper]

[holta]

1. This PR aims to help testing (of yt-dlp etc) by allowing for manual copying of /usr/local/calibre-web-py3/scripts/lb-wrapper.greedy to /usr/local/bin/lb-wrapper in order to...

2. Force downloading of very large videos e.g. for OOM (out-of-memory) during testing of things like:

• Some videos download as overweight (giant) files that (1) are not appropriate for schools, and (2) crash Calibre-Web with "502 Bad Gateway" #37
• PR [Workaround for] OOM / memory "502 Bad Gateway" crashes w/ large videos' playback or download-to-client [SEE ALSO #37 & #53] #51
• Give everyone access to all books, intentionally ignoring Calibre-Web ACL accounts/authorization? #53
• PR Restrict NGINX (public?) access to "large" files only (e.g. .mp3, .mp4, .webm) in /library/calibre-web — for PR #51 OOM workaround #57
• PR Sort formats [720p codec, viewing bitrate ~2 Mbit/s] #60
• PR scripts/lb-wrapper: Try "--format-sort='tbr~1000'" [i.e. target 1000 kbit/s codecs] #62
• PR scripts/lb-wrapper: Try yt-dlp with "--format best --format-sort 'tbr~1000'" [testing shows need for URL validation, clearly communicated, for users who accidentally request the impossible after clicking "Download to IIAB" > "Start"] #63

While refactoring to build on:

• PR Use correct option [lb --write-thumbnail, and also fix logging explanation to match recent changes] #54

[holta]

This PR tested successfully!

ASIDE: MP4 downloads such as this one (https://www.youtube.com/watch?v=-rJ55fp1JlY, "22 Miles (35 km) in a Blizzard Without a Tent - Solo Camping in Survival Shelters") evidently need more work to get their covers / posters / thumbnails working — building on:

• PR Fix missing cover [for MP4; not just WebM] #59

[holta]

@deldesir @EMG70 another codec data point for us, building on PR #63:

root@box:/library/calibre-web/Outdoor Boys/22 Miles (35 km) in a Blizzard Without a Tent - Solo Camping in Survival Shelters (2)# mediainfo 22\ Miles\ \(35\ km\)\ in\ a\ Blizzard\ Without\ a\ T\ -\ Outdoor\ Boys.mp4
General
Complete name                            : 22 Miles (35 km) in a Blizzard Without a T - Outdoor Boys.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 136 MiB
Duration                                 : 32 min 35 s
Overall bit rate                         : 583 kb/s
Frame rate                               : 29.970 FPS
Movie name                               : 22 Miles (35 km) in a Blizzard Without a Tent - Solo Camping in Survival Shelters
Performer                                : Outdoor Boys
Description                              : Outdoor Boys on FACEBOOK / https://www.facebook.com/TeamOutdoorBoys /  / Outdoor Boys on INSTAGRAM / @outdoorboyschannel /  / BUY OUTDOOR BOYS T-SHIRTS /  http://shop.spreadshirt.com/catsandcarp/
Recorded date                            : 20231209
Writing application                      : Lavf60.16.100
Comment                                  : https://www.youtube.com/watch?v=-rJ55fp1JlY
LongDescription                          : Outdoor Boys on FACEBOOK / https://www.facebook.com/TeamOutdoorBoys /  / Outdoor Boys on INSTAGRAM / @outdoorboyschannel /  / BUY OUTDOOR BOYS T-SHIRTS /  http://shop.spreadshirt.com/catsandcarp/

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L3
Format settings                          : CABAC / 3 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 3 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 32 min 35 s
Bit rate                                 : 479 kb/s
Width                                    : 640 pixels
Height                                   : 360 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 (29970/1000) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.069
Stream size                              : 112 MiB (82%)
Title                                    : ISO Media file produced by Google Inc.
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 32 min 35 s
Bit rate mode                            : Constant
Bit rate                                 : 96.0 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 22.4 MiB (16%)
Title                                    : ISO Media file produced by Google Inc.
Language                                 : English
Default                                  : Yes
Alternate group                          : 1