feat(create-typink): add flexibility in package manager when initializing project

[1cedrus]

• This PR addresses a task in Improve create-typink cli for ink! v6 #194 by adding flexibility to the package manager used when calling create-typink. Previously, it defaulted to yarn; now it automatically detects the package manager the user intends to use.
• If the package manager cannot be detected automatically, it defaults to using npm.
• Examples with currently supported package managers:
  • $ npm create typink
  • $ yarn create typink
  • $ bun create typink
  • $ pnpm create typink

[Copilot]

Pull Request Overview

This PR enhances the create-typink CLI tool to automatically detect and use the package manager that the user invoked the tool with, instead of defaulting to yarn. The tool now supports npm, yarn, pnpm, and bun package managers with automatic detection based on the user agent environment variable.

• Adds package manager detection via user agent parsing
• Updates installation commands and help messages to use the detected package manager
• Simplifies project structure by removing workspace configuration and moving contracts to src/contracts

Reviewed Changes

Copilot reviewed 28 out of 123 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/create-typink/src/utils/string.ts	Adds pkgFromUserAgent function for parsing package manager from user agent
packages/create-typink/src/utils/render.ts	Updates help messages to use detected package manager instead of hardcoded yarn
packages/create-typink/src/types.ts	Adds PkgManagerInfo interface and updates BaseOptions to include package manager
packages/create-typink/src/utils/options.ts	Sets default package manager to npm in options
packages/create-typink/src/index.ts	Implements package manager detection and assignment to options
packages/create-typink/src/tasks/installPackages.ts	Updates package installation to use detected package manager
packages/create-typink/src/createProject.ts	Updates task title to show detected package manager
Template files	Restructures project from workspace to single package, moves contracts to src/contracts, updates imports

Comments suppressed due to low confidence (1)

[sinzii]

Looking neat to me, I've made some minor changes, let's go with this first! Thanks!