Update Readme file. Simplification and highlighting of first steps for easy onboarding

docs: update readme, defer roadmap

refactor: vanilla/advanced mode separation

Merge pull request #2 from DrSeedon/main

docs: rewrite TODO with actual done/remaining status per module

fix: survival engine normalize stats, time manager improvements, test fixes

feat: campaign rules system, survival engine improvements, GUI & navigation fixes

feat: GUI caching, vehicle stopping distance, player position auto-resolve

fix: BFS uses bidirectional connections, update hierarchy rules + creation-rules

feat: hierarchical location system — compound/interior with entry points, BFS navigation, GUI drill-down

feat: narrator style system + dm-continue rules loading fix

feat: enhance new-game and module rules for improved gameplay

feat: vehicle system in world-travel + module system v2 fixes

feat: module system v2 + time tracking + timed consequences

test: configure pytest to auto-discover module tests