Artem Akymenko f151a1ae0d docs: archive historical plans, remove duplicates ...

- Move migration-roadmap.md, epub3_upgrade_plan.md, entities_step_overhaul_plan.md to docs/archive/
- Remove duplicate tts-plugin-architecture.md

2026-07-12 16:20:30 +03:00

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entities_step_overhaul_plan.md

docs: archive historical plans, remove duplicates

2026-07-12 16:20:30 +03:00

epub3_upgrade_plan.md

docs: archive historical plans, remove duplicates

2026-07-12 16:20:30 +03:00