fix: add @clack/prompts transitive deps to fix npx installation

[mfrancime]

Summary

• Adds fast-wrap-ansi, fast-string-width, and sisteransi as direct dependencies

Problem

When installed via npx, npm's flat node_modules cache fails to hoist ESM-only transitive dependencies from @clack/prompts → @clack/core. This causes:

Cannot find package '/root/.npm/_npx/.../node_modules/fast-wrap-ansi/index.js'
imported from /root/.npm/_npx/.../node_modules/@clack/core/dist/index.mjs

Reproduces on: Node 24.11.0 + npm 11.6.1 with npx @colbymchenry/codegraph@0.7.3

Root cause

@clack/core@1.2.0 imports fast-wrap-ansi (ESM-only, no exports map, just "main": "lib/main.js"). In a normal npm install, dependency hoisting puts fast-wrap-ansi in the top-level node_modules/. But in an npx cache directory, the flat structure sometimes fails to resolve these transitive ESM deps, causing a Cannot find package error at runtime.

Fix

Promote the three transitive dependencies (fast-wrap-ansi, fast-string-width, sisteransi) to direct dependencies in package.json. This guarantees they're always installed at the top level regardless of installation method. These are already required at runtime — this just makes the dependency explicit.

Test plan

• npx @colbymchenry/codegraph --help works on Node 24 after clearing ~/.npm/_npx
• npm install -g @colbymchenry/codegraph still works
• Interactive installer launches without import errors

🤖 Generated with Claude Code

[colbymchenry]

Thanks for the diagnosis — verified the npm hoisting issue is real and the transitive-deps were exactly as you identified.

Pushed a follow-up commit to your branch bumping the pins to match @clack/prompts@1.3.0 (which shipped after this PR was opened and changed the transitive versions to fast-wrap-ansi@^0.2.0 and fast-string-width@^3.0.2). Merging now.