fix(nextcloud)!: Move RichObjectParameter from spreed to core and fix rich parameter typing for broken apps

[provokateurin]

Split off from #2456

I squashed the previously separate commits as they need each other to make sense.

[Leptopoda]

Not ideal, that we lose the typing on the spreed and notifications :(
LGTM overall, please just address the small parsing issue.

[codecov]

Codecov Report

Attention: Patch coverage is 9.12779% with 448 lines in your changes missing coverage. Please review.

Project coverage is 28.37%. Comparing base (2abdd80) to head (f4fd9cf).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
...ges/nextcloud/lib/src/api/core/core.openapi.g.dart	0.24%	402 Missing ⚠️
...s/nextcloud/lib/src/api/spreed/spreed.openapi.dart	25.00%	18 Missing ⚠️
...kages/nextcloud/lib/src/api/core/core.openapi.dart	37.03%	17 Missing ⚠️
...src/api/notifications/notifications.openapi.g.dart	33.33%	8 Missing ⚠️
...nextcloud/lib/src/api/spreed/spreed.openapi.g.dart	66.66%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2501      +/-   ##
==========================================
- Coverage   30.27%   28.37%   -1.90%     
==========================================
  Files         352      352              
  Lines      124321   135904   +11583     
==========================================
+ Hits        37632    38560     +928     
- Misses      86689    97344   +10655     

Flag	Coverage Δ		*Carryforward flag
account_repository	98.77% <ø> (ø)
cookie_store	99.48% <ø> (ø)		Carriedforward from 2abdd80
dashboard_app	96.05% <ø> (ø)
dynamite	31.08% <ø> (ø)		Carriedforward from 2abdd80
dynamite_end_to_end_test	61.69% <ø> (ø)		Carriedforward from 2abdd80
dynamite_runtime	85.40% <ø> (ø)		Carriedforward from 2abdd80
neon_dashboard	96.05% <ø> (ø)		Carriedforward from 2abdd80
neon_framework	57.07% <ø> (ø)
neon_http_client	96.69% <ø> (ø)
neon_notifications	100.00% <ø> (ø)		Carriedforward from 2abdd80
neon_talk	99.45% <ø> (ø)		Carriedforward from 2abdd80
nextcloud	24.14% <5.88%> (-1.74%)	⬇️
notifications_app	100.00% <ø> (ø)
sort_box	90.90% <ø> (ø)		Carriedforward from 2abdd80
talk_app	99.09% <100.00%> (+<0.01%)	⬆️

*This pull request uses carry forward flags. Click here to find out more.

Files with missing lines	Coverage Δ
...ork/packages/talk_app/lib/src/widgets/message.dart	99.00% <100.00%> (+<0.01%)	⬆️
...alk_app/lib/src/widgets/rich_object/deck_card.dart	100.00% <ø> (ø)
...talk_app/lib/src/widgets/rich_object/fallback.dart	100.00% <ø> (ø)
...ges/talk_app/lib/src/widgets/rich_object/file.dart	100.00% <100.00%> (ø)
.../talk_app/lib/src/widgets/rich_object/mention.dart	100.00% <100.00%> (ø)
...b/src/api/notifications/notifications.openapi.dart	56.02% <100.00%> (-4.60%)	⬇️
...nextcloud/lib/src/api/spreed/spreed.openapi.g.dart	14.38% <66.66%> (-0.81%)	⬇️
...src/api/notifications/notifications.openapi.g.dart	30.68% <33.33%> (-3.31%)	⬇️
...kages/nextcloud/lib/src/api/core/core.openapi.dart	39.99% <37.03%> (-5.46%)	⬇️
...s/nextcloud/lib/src/api/spreed/spreed.openapi.dart	32.29% <25.00%> (-0.85%)	⬇️
... and 1 more

... and 8 files with indirect coverage changes