refactor clan management

[fcaps]

closes #445

refactored all clan pages except transfer leadership.

[codecov]

Codecov Report

Attention: 152 lines in your changes are missing coverage. Please review.

Comparison is base (db94e34) 44.75% compared to head (d709955) 41.79%.

Files	Patch %	Lines
src/backend/services/ClanManagementRepository.js	0.00%	26 Missing ⚠️
src/backend/routes/views/clans/view.js	31.03%	17 Missing and 3 partials ⚠️
src/backend/routes/views/clans/join.js	10.52%	17 Missing ⚠️
src/backend/routes/views/clans/inviteAccept.js	11.11%	16 Missing ⚠️
src/backend/routes/views/clans/kick.js	11.11%	16 Missing ⚠️
src/backend/routes/views/clans/leave.js	11.11%	16 Missing ⚠️
src/backend/routes/views/clans/invite.js	21.05%	15 Missing ⚠️
src/backend/services/ClanManagementService.js	0.00%	14 Missing ⚠️
src/backend/services/DataRepository.js	25.00%	9 Missing ⚠️
src/backend/routes/views/clans/get/manage.js	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #523      +/-   ##
===========================================
- Coverage    44.75%   41.79%   -2.96%     
===========================================
  Files           64       70       +6     
  Lines         1506     1682     +176     
  Branches       183      220      +37     
===========================================
+ Hits           674      703      +29     
- Misses         801      947     +146     
- Partials        31       32       +1     

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