feat(zod-transform-socials): add generated label field

[qianmao1989]

Summary

Adds a label field to the transformed social link output as requested in #42.

Label Generation Precedence

1. Explicit input label — from object social input (e.g., label: "Official Website")
2. Known platform name — when platform !== "custom" (e.g., "github", "bsky")
3. URL fallback — strips leading www. from hostname (e.g., "fujocoded.com")

Changes

• zod-transform-socials/index.ts:
  • Added optional label field to SocialsSchema input object
  • Added generateLabel() helper function
  • Updated buildTransformSocial to include label in output

Example

// Input
["https://github.com/FujoWebDev", { url: "https://store.fujocoded.com", label: "Merch Store" }]

// Output
[
  { url: "https://github.com/FujoWebDev", platform: "github", username: "fujowebdev", icon: "simple-icons:github", label: "github" },
  { url: "https://store.fujocoded.com", platform: "custom", username: null, icon: null, label: "Merch Store" }
]

Fixes #42