Ferric --verbose --concurrency and --clean

[kraenhansen]

Merging this PR will add three options to ferric:

• --verbose outputs more to the terminal while building
• --concurrency puts a limit on the number of concurrent sub-command invocations
• --clean deletes the target (build) directory before building

[Copilot]

Pull Request Overview

This PR adds three new command-line options to the ferric build tool to improve developer experience and control over build processes:

• --verbose enables detailed output from underlying compilers and tools
• --concurrency limits parallel build tasks (defaults to CPU count)
• --clean removes the target directory before building

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/ferric/src/cargo.ts	Passes verbose flag to control cargo output mode and add target prefixes
packages/ferric/src/build.ts	Implements all three new options with concurrency control and improved logging
packages/cli-utils/src/index.ts	Exports p-limit for concurrency control
packages/cli-utils/package.json	Adds p-limit dependency
.changeset/evil-pens-shop.md	Documents cli-utils changes
.changeset/big-plums-write.md	Documents ferric-cli changes

[Copilot]

The isSilent: verbose logic appears counterintuitive - when verbose mode is enabled, the spinner becomes silent. Consider renaming to make the relationship clearer, or add a comment explaining that verbose mode replaces the spinner with direct output.

Suggested change

	{
	{
	// In verbose mode, direct output replaces the spinner, so we silence it.