Feature/jss 120 nagachore cleanup

[Ansonhkg]

WHAT

• Migrated https://github.com/LIT-Protocol/docs-v2 into the monorepo
• Added a script to sync changelog from ./packages/**/CHANGELOG.md

WHY

• keep the Mintlify changelog synchronised with package releases without manual copy-paste.

[Copilot]

Pull Request Overview

This PR migrates the docs-v2 repository into the monorepo and adds a changelog sync script to automate Mintlify changelog updates.

Key Changes

• Migrated documentation from docs-v2 repository into the monorepo under /docs directory
• Added automated script to sync changelog entries from package CHANGELOG.md files to unified docs changelog
• Cleaned up test/alpha release entries from package changelog files for production readiness

Reviewed Changes

Copilot reviewed 63 out of 67 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tools/sync-docs-changelog.js	New script to automatically sync package changelogs to Mintlify docs
packages/**/CHANGELOG.md	Cleaned up test and alpha release entries from multiple packages
docs/**	Complete documentation migration with SDK reference, guides, and examples
package.json	Added sync script and packageManager field
.prettierignore	Excluded docs and changelogs from formatting

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