Replace raw usage of fmt.Print with pcio.Print (#73)

## Problem
There's confirmation prompts where we're using `fmt.Print` directly
rather than `pcio.Print`. We're going to be refactoring the pcio package
more broadly, so for now just align the raw Print calls with the shim'd
package.

## Solution
Replace raw usage of `fmt.Print` with `pcio.Print`.

## Type of Change
- [X] 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
There should be no user-visible change due to this code change.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk: small output-path changes for interactive prompts, with one
error-message formatting tweak; no API or deletion logic changes.
> 
> **Overview**
> Switches several destructive-action confirmation prompts (API key,
project, organization, and local key prune) from `fmt.Print` to
`pcio.Print` so prompt output respects the CLI’s `pcio` shim/quiet-mode
behavior.
> 
> Also standardizes the input read error path in `auth local-keys prune`
to use `msg.FailMsg` instead of printing directly to stdout.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
4f97284. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: austin-denoble

internal/pkg/cli/command/apiKey/delete.go

@@ -11,6 +11,7 @@ import (
 	"github.com/pinecone-io/cli/internal/pkg/utils/exit"
 	"github.com/pinecone-io/cli/internal/pkg/utils/help"
 	"github.com/pinecone-io/cli/internal/pkg/utils/msg"
+	"github.com/pinecone-io/cli/internal/pkg/utils/pcio"
 	"github.com/pinecone-io/cli/internal/pkg/utils/sdk"
 	"github.com/pinecone-io/cli/internal/pkg/utils/style"
 	"github.com/pinecone-io/cli/internal/pkg/utils/text"
@@ -103,7 +104,7 @@ func confirmDeleteApiKey(apiKeyName string) {
 	msg.WarnMsg("This action cannot be undone.")
 
 	// Prompt the user
-	fmt.Print("Do you want to continue? (y/N): ")
+	pcio.Print("Do you want to continue? (y/N): ")
 
 	// Read the user's input
 	reader := bufio.NewReader(os.Stdin)

internal/pkg/cli/command/auth/local_keys_prune.go

@@ -191,13 +191,13 @@ func confirmPruneKeys(plan []planItem, options pruneLocalKeysCmdOptions) (bool,
 	msg.WarnMsg("This action cannot be undone.")
 
 	// Prompt the user
-	fmt.Print("Do you want to continue? (y/N): ")
+	pcio.Print("Do you want to continue? (y/N): ")
 
 	// Read the user's input
 	reader := bufio.NewReader(os.Stdin)
 	input, err := reader.ReadString('\n')
 	if err != nil {
-		fmt.Println("Error reading input:", err)
+		msg.FailMsg("Error reading input: %+v", err)
 		return false, err
 	}
 

internal/pkg/cli/command/organization/delete.go

@@ -104,7 +104,7 @@ func confirmDelete(organizationName string, organizationID string) {
 	msg.WarnMsg("This action cannot be undone.")
 
 	// Prompt the user
-	fmt.Print("Do you want to continue? (y/N): ")
+	pcio.Print("Do you want to continue? (y/N): ")
 
 	// Read the user's input
 	reader := bufio.NewReader(os.Stdin)

internal/pkg/cli/command/project/delete.go

@@ -117,7 +117,7 @@ func confirmDelete(projectName string) {
 	msg.WarnMsg("This action cannot be undone.")
 
 	// Prompt the user
-	fmt.Print("Do you want to continue? (y/N): ")
+	pcio.Print("Do you want to continue? (y/N): ")
 
 	// Read the user's input
 	reader := bufio.NewReader(os.Stdin)