feat(ci): expose guest-cpu/guest-memory-mb; ns7zip Linux 8GB

job.py already patches the clone VMX (numvcpus/memsize) via
--guest-cpu/--guest-memory-mb; expose them as action inputs
(default '0' = keep template). build-ns7zip.yml sets
guest-memory-mb: 8192 — the parallel MinGW cross-compile thrashes at
the 4 GB Linux template default (Windows template is 6 GB).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/actions/local-ci-build/action.yml

@@ -156,6 +156,22 @@ inputs:
     required: false
     default: '{}'
 
+  guest-cpu:
+    description: >
+      Override the build VM vCPU count (numvcpus in the clone VMX).
+      "0" (default) keeps the template value.
+    required: false
+    default: '0'
+
+  guest-memory-mb:
+    description: >
+      Override the build VM RAM in MB (memsize in the clone VMX).
+      "0" (default) keeps the template value. Raise for memory-heavy
+      parallel builds (e.g. the Linux MinGW cross-compile thrashes at
+      the 4 GB template default).
+    required: false
+    default: '0'
+
   use-shared-cache:
     description: >
       Set to "true" to redirect NuGet and pip caches to VMware shared folders
@@ -212,6 +228,8 @@ runs:
         INPUT_EXTRA_GUEST_ENV_JSON:  ${{ inputs.extra-guest-env-json }}
         INPUT_USE_SHARED_CACHE:      ${{ inputs.use-shared-cache }}
         INPUT_SKIP_ARTIFACT:         ${{ inputs.skip-artifact }}
+        INPUT_GUEST_CPU:             ${{ inputs.guest-cpu }}
+        INPUT_GUEST_MEMORY_MB:       ${{ inputs.guest-memory-mb }}
       run: |
         #Requires -Version 5.1
         Set-StrictMode -Version Latest
@@ -325,6 +343,9 @@ runs:
         else { $pyArgs += '--use-git-clone' }
         if ($env:INPUT_USE_SHARED_CACHE -eq 'true') { $pyArgs += '--use-shared-cache' }
         if ($env:INPUT_SKIP_ARTIFACT    -eq 'true') { $pyArgs += '--skip-artifact' }
+        # VMX overrides: forward only when > 0 (0 = keep template value).
+        if ([int]($env:INPUT_GUEST_CPU)       -gt 0) { $pyArgs += @('--guest-cpu', $env:INPUT_GUEST_CPU) }
+        if ([int]($env:INPUT_GUEST_MEMORY_MB) -gt 0) { $pyArgs += @('--guest-memory-mb', $env:INPUT_GUEST_MEMORY_MB) }
         if ($env:INPUT_EXTRA_GUEST_ENV_JSON -and $env:INPUT_EXTRA_GUEST_ENV_JSON -ne '{}') {
             $pyArgs += @('--extra-env-json', $env:INPUT_EXTRA_GUEST_ENV_JSON)
         }