[dblock]

Ports the complete behavior of dblock/ruby-gem-release#54 and adds optional glob selection.

await project.copyFiles(sourceRoot);                         // Whole project.
await project.copyFiles(sourceRoot, "**/*.{js,md}");           // Glob matches.
await project.copyFiles(sourceRoot, ["README.md", "bin/run"]); // Exact files.
await project.copyFiles(sourceRoot, []);                     // Nothing.

Glob strings support wildcards, recursive **, character classes, and brace alternatives with portable / separators. Hidden files are included; no matches copy nothing. Arrays remain literal file lists, including filenames containing glob characters. A stable minimatch dependency provides matching on all supported Node.js versions without using experimental runtime glob APIs.

Recursive/glob copying preserves nested paths, binary bytes and modes, and skips .git metadata at every level. Exact metadata selections and source/destination aliases into metadata are rejected before copying any file. Matching uses the existing non-following directory walk and canonical-root preflight, not a filesystem glob that traverses directory links. The real lifecycle example copies its files recursively and runs a focused fixture test command.

Validation: 92 source tests; npm run lint; actual packed-consumer installation with shared recursive/glob/exact-copy and metadata-protection checks, installed declarations, and the executable lifecycle example. The testing module has 100% line/function and 97.63% branch coverage.

AI-authored by GitHub Copilot on behalf of @dblock.