Add configurable kanban board experience to DarkFactory

[burieberry]

Summary

• add reusable boxel-ui kanban components with drag/drop placement, column headers, ghost rendering, and add-card support
• add DarkFactory kanban card types and related metadata/config models in software-factory
• refactor the DarkFactory project board into a configurable kanban experience with grouping, ordering, collapsing, WIP limits, and toolbar/settings controls
• add focused tests for the kanban engine, drag manager, plane behavior, and software-factory integration

[github-actions]

Preview deployments

• Host staging preview
• Host production preview
• Boxel UI staging preview

[github-actions]

Realm Server Test Results

    1 files  ±0      1 suites  ±0   18m 42s ⏱️ +57s
1 086 tests ±0  1 086 ✅ ±0  0 💤 ±0  0 ❌ ±0 
1 158 runs  ±0  1 158 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 2c39e9e. ± Comparison against base commit 905c32a.

[github-actions]

Host Test Results

    1 files  ±0      1 suites  ±0   2h 39m 30s ⏱️ - 20m 54s
2 473 tests ±0  2 458 ✅ ±0  15 💤 ±0  0 ❌ ±0 
2 492 runs  ±0  2 477 ✅ ±0  15 💤 ±0  0 ❌ ±0 

Results for commit 2c39e9e. ± Comparison against base commit 905c32a.

[habdelra]

so darkfactory module is just a place holder for the real thing. we don't have to keep this going forward. Ian specifically named it dark factory to discourage us from using it for real. the real project/issue/knowledge articles can be something official that lives in base or wherever the home is for the "high quality" cards. we just need to make sure to include whatever realm that is into the test-harness (base is included by default)

[habdelra]

Also if it helps there is a debug setting on the test harness that will help for fixing these test failures

Default                                                                                                                                              
                                                                                                                                                       
  playwright.config.ts:3-5 sets LOG_LEVELS ??= to:                                                                                                     
  *=warn,software-factory:playwright=info,software-factory:playwright:support=info,software-factory:playwright:cache=info,prerenderer-chrome=none
  The ??= means a shell-set LOG_LEVELS wins.                                                                                                           
                                                                                                                                                       
  Browser console from prerenderer (the usual case)                                                                                                    
                                                                                                                                                       
  LOG_LEVELS='*=warn,prerenderer-chrome=info' pnpm exec playwright test                                                                                
  Host-command console.log runs in headless Chrome — silenced unless prerenderer-chrome is info/debug.                                                 
                                                                                                                                                       
  Add child realm-server / worker stdio to the terminal                                                                                                
                                                                                                                                                       
  SOFTWARE_FACTORY_DEBUG_SERVER=1 LOG_LEVELS='*=warn,prerenderer-chrome=info' pnpm exec playwright test
  SOFTWARE_FACTORY_DEBUG_SERVER=1 flips managedProcessStdio from pipe → inherit (harness/shared.ts:215).                                               
                                                                                                                                                       
  Tune the child realm's own log levels                                                                                                                
                                                                                                                                                       
  SOFTWARE_FACTORY_REALM_LOG_LEVELS='*=info,realm-index-updater=debug,index-runner=debug' \
    pnpm exec playwright test                                                                                                                          
  (harness/shared.ts:192.)   
                                                                                                                                                       
  Everything, loudest        
                                                                                                                                                       
  SOFTWARE_FACTORY_DEBUG_SERVER=1 \
  SOFTWARE_FACTORY_REALM_LOG_LEVELS='*=debug' \                                                                                                        
  LOG_LEVELS='*=debug' \                                                                                                                               
    pnpm exec playwright test