Repository: yt-dlp
Issue: [bandcamp] Support public user wishlist and collection pages
Labels: site-enhancement,triage

### DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

- [X] I understand that I will be **blocked** if I *intentionally* remove or skip any mandatory\* field

### Checklist

- [X] I'm requesting a site-specific feature
- [X] I've verified that I have **updated yt-dlp to nightly or master** ([update instructions](https://github.com/yt-dlp/yt-dlp#update-channels))
- [X] I've checked that all provided URLs are playable in a browser with the same IP and same login details
- [X] I've searched [known issues](https://github.com/yt-dlp/yt-dlp/issues/3766) and the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar issues **including closed ones**. DO NOT post duplicates
- [X] I've read the [guidelines for opening an issue](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#opening-an-issue)
- [X] I've read about [sharing account credentials](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#are-you-willing-to-share-account-details-if-needed) and I'm willing to share it if required

### Region

_No response_

### Example URLs

Wishlist page examples:
https://bandcamp.com/Parazene/wishlist
https://bandcamp.com/half-gifts/wishlist

Collection examples:
https://bandcamp.com/Parazene
https://bandcamp.com/half-gifts
https://bandcamp.com/mktackabery

### Provide a description that is worded well enough to be understood

The `bandcamp` extractor currently supports downloading every album on an artist's or record label's discography page treating it like a list of playlists. I would like this to also be extended to user wishlists and collections.

User wishlists have the form: 
`https://bandcamp.com/<USER_ID>/wishlist`

And user collections have the form:
`https://bandcamp.com/<USER_ID>`

Visibility of the wishlist page may be set to private and thus not always available. When the wishlist is private the collections page is returned instead.

### Provide verbose output that clearly demonstrates the problem

- [X] Run **your** yt-dlp command with **-vU** flag added (`yt-dlp -vU <your command line>`)
- [ ] If using API, add `'verbose': True` to `YoutubeDL` params instead
- [X] Copy the WHOLE output (starting with `[debug] Command-line config`) and insert it below

### Complete Verbose Output

```shell
[debug] Command-line config: ['-vU', 'https://bandcamp.com/Parazene/wishlist']
[debug] User config "/home/neurognostic/.config/yt-dlp/config": ['--output', '%(uploader,channel,uploader_id)s/%(title)s.%(ext)s', '--downloader=aria2c', '--downloader-args=aria2c:--min-split-size=1M --max-connection-per-server=16 --split=16', '--yes-playlist', '--sub-langs', 'all,-live_chat', '--format', 'bv*[height<=?1440]+ba/b[height<=?1440]/bv*+ba/b', '--prefer-ffmpeg', '--embed-subs', '--embed-thumbnail', '--embed-metadata']
[debug] Encodings: locale UTF-8, fs utf-8, pref UTF-8, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2023.11.16 from yt-dlp/yt-dlp [24f827875]
[debug] Lazy loading extractors is disabled
[debug] Python 3.11.6 (CPython x86_64 64bit) - Linux-6.6.3-zen1-1-zen-x86_64-with-glibc2.38 (OpenSSL 3.1.4 24 Oct 2023, glibc 2.38)
[debug] exe versions: ffmpeg 6.1 (setts), ffprobe 6.1, rtmpdump 2.4
[debug] Optional libraries: Cryptodome-3.12.0, brotlicffi-1.1.0.0, certifi-2023.11.17, mutagen-1.47.0, pyxattr-0.8.1, requests-2.31.0, secretstorage-3.3.3, sqlite3-3.44.2, urllib3-1.26.18
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests
[debug] Loaded 1792 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2023.11.16 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2023.11.16 from yt-dlp/yt-dlp)
[generic] Extracting URL: https://bandcamp.com/Parazene/wishlist
[generic] wishlist: Downloading webpage
WARNING: [generic] Falling back on generic information extractor
[generic] wishlist: Extracting information
[debug] Looking for embeds
ERROR: Unsupported URL: https://bandcamp.com/Parazene/wishlist
Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/yt_dlp/YoutubeDL.py", line 1570, in wrapper
    return func(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/yt_dlp/YoutubeDL.py", line 1705, in __extract_info
    ie_result = ie.extract(url)
                ^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/yt_dlp/extractor/common.py", line 717, in extract
    ie_result = self._real_extract(url)
                ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/yt_dlp/extractor/generic.py", line 2531, in _real_extract
    raise UnsupportedError(url)
yt_dlp.utils.UnsupportedError: Unsupported URL: https://bandcamp.com/Parazene/wishlist
```