fix: handle symlinks in dev mode linking

[technophile-04]

Description:

After #386, if you try to run the extension in dev mode it was failing with the below error:

Error

❯ yarn cli ../402-updates-extension -e create-eth-extensions --dev

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 | Create Scaffold-ETH 2 app |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+



✔ 📁 Create project directory /Users/shivbhonde/Desktop/github/402-updates-extension
✖ EPERM: operation not permitted, link
  '/Users/shivbhonde/Desktop/github/create-eth/templates/base/.claude/skills/defi-protocol-templates' ->
  '/Users/shivbhonde/Desktop/github/402-updates-extension/.claude/skills/defi-protocol-templates'
◼ 📦 Installing dependencies with yarn, this could take a while
◼ 🪄 Formatting files
◼ 📡 Initializing Git repository
ERROR Error occurred Error: EPERM: operation not permitted, link '/Users/shivbhonde/Desktop/github/create-eth/templates/base/.claude/skills/defi-protocol-templates' -> '/Users/shivbhonde/Desktop/github/402-updates-extension/.claude/skills/defi-protocol-templates'
    at async link (node:internal/fs/promises:1052:10)
    at async file:///Users/shivbhonde/Desktop/github/create-eth/dist/cli.js:81:13
    at async Promise.all (index 0)
    at async linkRecursive (file:///Users/shivbhonde/Desktop/github/create-eth/dist/cli.js:70:9)
    at async file:///Users/shivbhonde/Desktop/github/create-eth/dist/cli.js:81:13
    at async Promise.all (index 1)
    at async linkRecursive (file:///Users/shivbhonde/Desktop/github/create-eth/dist/cli.js:70:9)
    at async file:///Users/shivbhonde/Desktop/github/create-eth/dist/cli.js:81:13
    at async Promise.all (index 2)
    at async linkRecursive (file:///Users/shivbhonde/Desktop/github/create-eth/dist/cli.js:70:9) {
  errno: -1,
  code: 'EPERM',
  syscall: 'link',
  path: '/Users/shivbhonde/Desktop/github/create-eth/templates/base/.claude/skills/defi-protocol-templates',
  dest: '/Users/shivbhonde/Desktop/github/402-updates-extension/.claude/skills/defi-protocol-templates'
}
Uh oh! 😕 Sorry about that! Exiting...

create-eth on  main [$] is 📦 v2.0.6 via  v22.11.0

Why this happend?

1. Templates contain symlinks - The .claude/skills/ directory has symlinks pointing to ../../.agents/skills/:
   defi-protocol-templates -> ../../.agents/skills/defi-protocol-templates
   solidity-security -> ../../.agents/skills/solidity-security

2. lstatSync doesn't follow symlinks - The original code used
   lstatSync(source).isDirectory() to check if a path is a directory. Unlike statSync,
   lstatSync returns info about the symlink itself, not its target. So a symlink pointing to a
   directory returns false for isDirectory().

3. Hard links don't work for symlinks to directories - When the symlink wasn't detected as a
   directory, the code fell through to link(source, destination) which creates a hard link. On
   macOS (and most Unix systems), you cannot create hard links for symlinks that point to
   directories - this fails with EPERM.

The Fix

Check if the source is a symlink first using stat.isSymbolicLink(), and if so, read the link target with readlinkSync and recreate the symlink at the destination using symlink()

[rin-st]

Looking and working great!