🩹 [Patch]: Add support for Linux ARM64 architecture (#35)

This pull request adds support for the Linux ARM64 architecture to the
PowerShell module, ensuring compatibility with a wider range of Linux
systems. The changes include updates to both the build process and
runtime module loading logic.

**Platform support improvements:**

* Added `linux-arm64` to the `$targetRuntimes` array in
`PSModule/build.ps1` to ensure the ARM64 runtime is built and included.

**Runtime detection and module loading:**

* Updated `src/main.ps1` to detect the Linux architecture at runtime
using `uname -m`, and conditionally load the appropriate native module
(`PSModule.Sodium.dll`) for either ARM64 (`aarch64`) or x64 (`x86_64`).
Throws a clear error for unsupported architectures.

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: MariusStorhaug <17722253+MariusStorhaug@users.noreply.github.com>
Co-authored-by: Marius Storhaug <marstor@hotmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

PSModule/build.ps1

@@ -2,6 +2,7 @@ Remove-Item -Path "$PSScriptRoot/../src/libs" -Recurse -Force -ErrorAction Silen
 
 $targetRuntimes = @(
     'linux-x64'
+    'linux-arm64'
     'win-x64'
     'win-x86'
     'osx-arm64'

src/main.ps1

@@ -1,7 +1,15 @@
 switch ($true) {
     $IsLinux {
-        Import-Module "$PSScriptRoot/libs/linux-x64/PSModule.Sodium.dll"
-        $script:Supported = $true
+        $architecture = (uname -m)
+        if ($architecture -eq 'aarch64') {
+            Import-Module "$PSScriptRoot/libs/linux-arm64/PSModule.Sodium.dll"
+            $script:Supported = $true
+        } elseif ($architecture -eq 'x86_64') {
+            Import-Module "$PSScriptRoot/libs/linux-x64/PSModule.Sodium.dll"
+            $script:Supported = $true
+        } else {
+            throw "Unsupported Linux architecture: $architecture. Please refer to the documentation for supported architectures."
+        }
     }
     $IsMacOS {
         if ("$(sysctl -n machdep.cpu.brand_string)" -Like 'Apple*') {