Game intro

As a new player of the game, a user should be presented with an intro experience that provides background on the game and walks them through how to play and interact with the game.

Things that should be included:
- Intro to devhouse, who they are, what trip this "devhouse" is, maybe something about the blog
- basic controls: walking, interacting
- maybe outline the first objective ? pending an objective existing

Things that should not be included:
- Fishing controls (this should be learned after the user purchases a rod)
- Transporting via the map (this is a debug feature)

The issue names no files, tests, or entry points, so first map the existing game's introductory and interaction flow. Done means providing background on devhouse, teaching walking and interaction, and optionally introducing the first objective while excluding fishing and debug map transport.

Written by the indexing model from the issue text.