build.ps1 resolves repo root one directory too high — build produces 0 functions

[juemerson-at-purestorage]

Summary

build.ps1 (repo root) fails to find Private/, Public/, and the .psd1 — it silently
builds a .psm1 with 0 private and 0 public functions and then errors copying the .psd1:

Building PureStorageFlashBladePowerShell...
  Private functions: 0
  Public functions:  0
  Generated <repoParent>\build\PureStorageFlashBladePowerShell\PureStorageFlashBladePowerShell.psm1 (27 lines)
Copy-Item: build.ps1:106
Line |
 106 |  Copy-Item -Path $psd1Source -Destination $OutputPath
     |  Cannot find path '<repoParent>\PureStorageFlashBladePowerShell.psd1' because it does not exist.

Root cause

Introduced in fc6d8de1 (v2.0.4). The path-resolution comment/logic assumes the script now
lives in <repo>/scripts/build.ps1 and walks up one directory to find the repo root:

https://github.com/dmann000/fb-powershell/blob/main/build.ps1#L18-L22

# This script lives in <repo>/scripts/; the source files (Public/, Private/, .psd1,
# .psm1, LICENSE) live in <repo>/. Resolve repoRoot one level up.
$scriptDir = if ($PSScriptRoot) { $PSScriptRoot } else { Split-Path -Parent $MyInvocation.MyCommand.Path }
if (-not $scriptDir) { $scriptDir = (Get-Location).Path }
$repoRoot = Split-Path -Parent $scriptDir

But build.ps1 was never actually moved into a scripts/ folder — it's still at repo root
alongside Public/, Private/, and the .psd1. So $repoRoot resolves to the parent of the
repo, one directory too high.

Repro

./build.ps1

from a clean checkout of main.

Suggested fix

Since the script is at repo root (not <repo>/scripts/), $repoRoot should just be
$scriptDir — see comment in the fix below.

[juemerson-at-purestorage]

Proposed fix

Since build.ps1 lives at repo root (not <repo>/scripts/), $repoRoot should just be
$scriptDir — no need to walk up a directory. Fix the stale comment at the same time so it
matches reality:

```diff
--- a/build.ps1
+++ b/build.ps1
@@ -15,10 +15,9 @@ param(
$ErrorActionPreference = 'Stop'
$moduleName = 'PureStorageFlashBladePowerShell'

-# This script lives in /scripts/; the source files (Public/, Private/, .psd1,
-# .psm1, LICENSE) live in /. Resolve repoRoot one level up.
-$scriptDir = if ($PSScriptRoot) { $PSScriptRoot } else { Split-Path -Parent $MyInvocation.MyCommand.Path }
-if (-not $scriptDir) { $scriptDir = (Get-Location).Path }
-$repoRoot = Split-Path -Parent $scriptDir
+# This script and the source files it packages (Public/, Private/, .psd1, .psm1, LICENSE)
+# all live at / (repo root), so repoRoot is just the script's own directory.
+$repoRoot = if ($PSScriptRoot) { $PSScriptRoot } else { Split-Path -Parent $MyInvocation.MyCommand.Path }
+if (-not $repoRoot) { $repoRoot = (Get-Location).Path }
```

(If the intent was actually to move build.ps1 into scripts/ and this repro is just from
running it pre-move, the alternative fix is to move the file there instead — either way, right
now the comment, the code, and the file's actual location don't agree, and the script silently
produces an empty build rather than failing loudly.)

Verified this restores correct behavior against current main (520 public functions,
.psd1 copied successfully). Happy to open a PR with this change if useful — didn't want to
bundle an unrelated fix into #1.