feat: import contacts from files via ocs

[st3iny]

Resolves #4632
Requires nextcloud/server#54729

Does not need a version check against server, as the current main branch is only compatible with Nextcloud 32 upwards.

CI will be green after the server PR is merged (due to the new interface missing).

Is currently hard to test as there is no usage of the API anywhere.

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.12%. Comparing base (9c9b007) to head (858b57b).

Files with missing lines	Patch %	Lines
lib/Controller/ImportController.php	87.50%	12 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##              main    #4654       +/-   ##
============================================
+ Coverage     9.59%   68.12%   +58.52%     
- Complexity     266      295       +29     
============================================
  Files          128       27      -101     
  Lines         6409      869     -5540     
  Branches      1191        0     -1191     
============================================
- Hits           615      592       -23     
+ Misses        5673      277     -5396     
+ Partials       121        0      -121     

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[SebastianKrupinski]

Morning.

This PR should be in app/dav I think. Since the CardDAV can be used without the contacts UI. This will not work unless the contacts UI is installed.

Refereance: nextcloud/server#49995

[SebastianKrupinski]

@st3iny accidentally clicke the approve button was ment to be a comment

[st3iny]

This PR should be in app/dav I think. Since the CardDAV can be used without the contacts UI. This will not work unless the contacts UI is installed.

@SebastianKrupinski This decision was already made in planning. The API is supposed to be a part of Contacts. Please read #4632 for more information.

Did not approve.

[ChristophWurst]

This PR should be in app/dav I think. Since the CardDAV can be used without the contacts UI. This will not work unless the contacts UI is installed.

It would be fine there too. To take some confusion we do hide a few calendar/contacts features from the user when the official calendar/contacts frontends are not there. I think this can be seen as one of those features.

[ChristophWurst]

Looks good so far!

This also needs an entry in capabilities in the style of this: https://github.com/tobiasKaminsky/declarativetest/blob/83716d84cde0efc6a6530adcd9b0219bdbb20e34/lib/Capabilities.php#L29

[ChristophWurst]

This also needs an entry in capabilities in the style of this: https://github.com/tobiasKaminsky/declarativetest/blob/83716d84cde0efc6a6530adcd9b0219bdbb20e34/lib/Capabilities.php#L29

@tobiasKaminsky do you have an example for how to let the user pick from a list? We need this for the selection of the address book