Remove pcio package and --quiet flag

[austin-denoble]

Problem

Describe the purpose of this change. What problem is being solved and why?

Solution

remove pcio package and --quiet flag entirely. update all usages of pcio. to fmt. to standardize output

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Infrastructure change (CI configs, etc)
• Non-code change (docs, etc)
• None of the above: (explain here)

Test Plan

Describe specific steps for validating this change.

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Note

Medium Risk
Removes the global --quiet flag and the pcio output wrapper, which is a user-visible/breaking CLI behavior change and could affect scripts relying on suppressed output or specific stdout/stderr routing.

Overview
Removes the custom pcio output wrapper and migrates CLI commands/presenters to standard fmt printing and fmt.Errorf error construction, updating JSON output paths to write directly to os.Stdout.

Eliminates the global --quiet flag and associated test helpers, deletes the pcio package entirely, and updates components that depended on it (e.g., spinners/prompt rendering and various command confirmation prompts).

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