Fix floating dependencies CI by replacing meta-updater

[wycats]

Summary

• Fixes floating dependencies CI failures by replacing @pnpm/meta-updater with custom TypeScript implementation
• Eliminates @pnpm/* peer dependency conflicts that were causing installation failures

Changes Made

• Removed: @pnpm/meta-updater and @pnpm/workspace.find-packages dependencies
• Added: Custom TypeScript package updater using standard Node.js libraries (globby, read-pkg, write-pkg, handlebars, deepmerge)
• Preserved: 100% identical package convention behavior
• Improved: Better error handling, type safety, and maintainability

Technical Details

The new implementation maintains all existing functionality:

• Package classification (published, built, private, root)
• Repository URL handling with directory paths
• PublishConfig exports generation (including @glimmer/vm-babel-plugins special case)
• Script management (prepack, test:publint, test:lint)
• DevDependency synchronization from catalog
• Rollup config generation/removal logic

Test Plan

• Verified behavioral equivalence through comprehensive analysis
• Tested package transformations for different package types
• Confirmed floating dependencies CI test resolution
• Validated idempotent operation (safe to run multiple times)

[github-actions]

	This PR	main
Dev	588K └─┬ . 169K ├── runtime 160K ├── syntax 100K ├── compiler 58K ├── opcode-compiler 27K ├── manager 24K ├── validator 11K ├── program 8.9K ├── reference 7.2K ├── destroyable 6.3K ├── util 4.3K ├── node 3.4K ├── global-context 2.5K ├── wire-format 1.0K ├── vm 969B ├── encoder 844B ├── vm-babel-plugins 606B └── owner	588K └─┬ . 169K ├── runtime 160K ├── syntax 100K ├── compiler 58K ├── opcode-compiler 27K ├── manager 24K ├── validator 11K ├── program 8.9K ├── reference 7.2K ├── destroyable 6.3K ├── util 4.3K ├── node 3.4K ├── global-context 2.5K ├── wire-format 1.0K ├── vm 969B ├── encoder 844B ├── vm-babel-plugins 606B └── owner
Prod	231K └─┬ . 70K ├── syntax 63K ├── runtime 48K ├── compiler 18K ├── opcode-compiler 7.9K ├── manager 5.1K ├── validator 4.8K ├── program 3.6K ├── reference 2.4K ├── util 2.1K ├── node 1.6K ├── wire-format 1.5K ├── destroyable 737B ├── vm 594B ├── global-context 516B ├── encoder 469B ├── vm-babel-plugins 155B └── owner	231K └─┬ . 70K ├── syntax 63K ├── runtime 48K ├── compiler 18K ├── opcode-compiler 7.9K ├── manager 5.1K ├── validator 4.8K ├── program 3.6K ├── reference 2.4K ├── util 2.1K ├── node 1.6K ├── wire-format 1.5K ├── destroyable 737B ├── vm 594B ├── global-context 516B ├── encoder 469B ├── vm-babel-plugins 155B └── owner