breaking: remove old task system

[imran31415]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 3.71471% with 1944 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
internal/tasks/database.go	4.16%	552 Missing ⚠️
internal/tasks/handler.go	0.00%	490 Missing ⚠️
internal/tasks/service.go	0.00%	275 Missing ⚠️
internal/gogent/core.go	0.00%	245 Missing ⚠️
internal/providers/ollama_provider.go	0.00%	190 Missing ⚠️
frontend/src/screens/AgentsScreen.tsx	0.00%	51 Missing ⚠️
internal/gogent/execution_engine.go	0.00%	49 Missing ⚠️
internal/providers/kimi_provider.go	3.22%	30 Missing ⚠️
internal/providers/factory.go	22.72%	16 Missing and 1 partial ⚠️
internal/tasks/context.go	73.77%	9 Missing and 7 partials ⚠️
... and 8 more

@@           Coverage Diff            @@
##            main    #150      +/-   ##
========================================
+ Coverage   3.94%   4.15%   +0.20%     
========================================
  Files        155     160       +5     
  Lines      35660   35212     -448     
  Branches    4108    4108              
========================================
+ Hits        1407    1462      +55     
+ Misses     34168   33659     -509     
- Partials      85      91       +6     

Files with missing lines	Coverage Δ
frontend/src/api/client.ts	19.39% <ø> (ø)
frontend/src/navigation/navigationConfig.ts	0.00% <ø> (ø)
frontend/src/screens/ConfigureScreen.tsx	0.00% <ø> (ø)
frontend/src/types/index.ts	0.00% <ø> (ø)
internal/teams/memory.go	0.00% <ø> (-0.65%)	⬇️
internal/types/types.go	77.77% <ø> (ø)
frontend/src/components/ModelSelector.tsx	0.00% <0.00%> (ø)
frontend/src/navigation/TabNavigator.tsx	0.00% <0.00%> (ø)
frontend/src/navigation/linking.ts	0.00% <0.00%> (ø)
frontend/src/navigation/ResponsiveTabNavigator.tsx	0.00% <0.00%> (ø)
... and 14 more

... and 3 files with indirect coverage changes

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