Moving system files to the CLI

[dkrevitt]

With the goal of separating user + application space.

Current situation

Atm, when one runs kurt init it creates 2 types of files in the user's filesystem:

1. Instructions (to be used by Cursor, Claude Code etc)
2. Writing project + format templates (in ./kurt/templates)

Issues with this

1. Shipping updates to system files requires updating the CLI, and then running a kurt init / kurt update to refresh system files. Awkward.
2. Project + format templates might be customized by the user (eg to conform to their style, structure needs). If these are edited in place in ./kurt/templates, this creates a need to decide on ignore / merge behavior when handling updates.

Potential solution

1. Move system files (instructions + format / project templates) to the CLI, accessible via a kurt show or similar command (inspired by Effect Solutions).
2. When a user a) customizes a format / project template or b) creates their own, create a local version of that template in kurt/templates, that will only be updated by the user (not any update process). This is user space.