refactor: replace console.log with structured logger across core/ (#80)

[MarcosBrendonDePaula]

Summary

• Replaced ~273 console.log/warn/error calls with structured logger across 26 files in core/
• Server files (database.ts, RoomSystem.ts, RoomBroadcaster.ts, config/index.ts) now use logger from @core/utils/logger (Winston-based)
• CLI/build files (commands, generators, create-project.ts, standalone.ts, sync-version.ts) now use buildLogger from @core/utils/build-logger (ANSI-based)
• Template strings containing console.log (generated code) are preserved unchanged

Closes #80

What was excluded (intentionally kept as console.log)

File	Calls	Reason
build-logger.ts	31	IS the logger implementation
group-logger.ts	12	IS the logger implementation
startup-banner.ts	5	Formatted banner display
flux-plugins-generator.ts	6	Template strings (generated code)
live-components-generator.ts	2	Template strings (generated code)
auto-generated-components.ts	2	Auto-generated file
eden.ts	3	Browser context
createStore.ts	1	Browser context
vite-dev.ts	1	Vite separator line
vite/index.ts	1	Vite proxy context
create-live-component.ts	1	Template string
integration.test.ts	1	Test file
Generator template strings	11	Generated React/plugin code

Mapping rules

Context	Logger	Mapping
Server runtime	logger	console.log → logger.info, console.warn → logger.warn, console.error → logger.error
CLI/build	buildLogger	console.log → buildLogger.info, success → buildLogger.success, console.error → buildLogger.error

Test plan

• Full test suite passes (597 passed, 0 failed)
• All template strings with console.log preserved (generated code)
• No remaining real console.log in modified files

🤖 Generated with Claude Code