fix(child_process): support shell text capture (#377)

- add cross-platform shell spawning and close lifecycle support
- decode encoded child output across native read boundaries
- cover the supported surface with differential compatibility evidence

Fixes #370

Co-authored-by: Hagege Ruben <20857346+HagegeR@users.noreply.github.com>

docs/src/generated/node-v24-compatibility-meta.json

@@ -2,6 +2,6 @@
   "schemaVersion": 3,
   "nodeVersion": "24.15.0",
   "nodeCommit": "848430679556aed0bd073f2bc263331ad84fa119",
-  "artifactVersion": "700e6429460b8481a546",
+  "artifactVersion": "80b3d2a5ad0d17bd8d8f",
   "rowCount": 3662
 }

docs/src/generated/node-v24-compatibility.json

@@ -218,9 +218,9 @@
       "apiEntries": 39,
       "static": {
         "supported": 0,
-        "partial": 8,
+        "partial": 11,
         "refused": 0,
-        "not-implemented": 31,
+        "not-implemented": 28,
         "by-design": 0,
         "unreviewed": 0,
         "not-applicable": 0
@@ -12233,9 +12233,9 @@
         "inherited": true
       },
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented for the documented scriptc module-loader subset.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -12317,9 +12317,9 @@
         "inherited": true
       },
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented for the documented scriptc module-loader subset.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -12345,9 +12345,9 @@
         "inherited": true
       },
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented for the documented scriptc module-loader subset.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",