fix(pgpm): use correct relative path in cd hint after init

[pyramation]

Summary

After pgpm init creates a module, it prints a cd ./<name> hint for the user. When the module is created inside a subdirectory (e.g. packages/), the hint was wrong — it only printed the bare module name (cd ./cards) instead of the actual relative path (cd ./packages/cards).

This fix uses path.relative(process.cwd(), modulePath) to compute the correct relative path from the user's current working directory to wherever the folder was actually created. Applied to all three cd hints:

• handleWorkspaceInit in index.ts (line 332)
• handleModuleInit in index.ts (line 622)
• runWorkspaceSetup in workspace.ts (line 77)

Review & Testing Checklist for Human

• Run pgpm init from a workspace root and confirm the hint says cd ./packages/<name>
• Run pgpm init from inside packages/ and confirm it says cd ./<name>
• Run pgpm init workspace and confirm it says cd ./<workspace-name>

Notes

The workspace cases were already correct in practice (workspace is always created directly in cwd), but updated for consistency and robustness when --cwd differs from process.cwd().

Link to Devin session: https://app.devin.ai/sessions/95ae737fc0464b04b83a1cb7af4c65dc
Requested by: @pyramation

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring