feat: support pipe splitting (like tee) and delayed piping (google#914)

* feat: support pipe splitting

BREAKING CHANGE: `p.halt()` should be replaced with `$({halt: true})`, stdio defaults to `pipe`

* test: add delayed `pipe()` test

* feat: add `pid` getter to `ProcessPromise`

* test: check chainable pipe literals

* test: kill nc process on end

* refactor!: remove `halt()` method

* refactor: remove runner logic from getters

* fix: enhance `Shell` result type

* chore: bring back `halt` method to avoid breaking change

* style: improve `Options` block formatting

* perf: improve cmd formatter

* chore: update internal reexports

* chore: up build deps

* chore(deps): update which to v5.0.0

Author: antongolub

.size-limit.json

@@ -9,7 +9,7 @@
   {
     "name": "zx/index",
     "path": "build/*.{js,cjs}",
-    "limit": "797 kB",
+    "limit": "800 kB",
     "brotli": false,
     "gzip": false
   },

package-lock.json

@@ -92,7 +92,7 @@
     "@types/node": ">=20"
   },
   "devDependencies": {
-    "@size-limit/file": "^11.1.5",
+    "@size-limit/file": "^11.1.6",
     "@types/fs-extra": "^11.0.4",
     "@types/minimist": "^1.2.5",
     "@types/node": ">=20.11.30",
@@ -104,8 +104,8 @@
     "create-require": "^1.1.1",
     "depseek": "^0.4.1",
     "dts-bundle-generator": "^9.5.1",
-    "esbuild": "^0.23.1",
-    "esbuild-node-externals": "^1.14.0",
+    "esbuild": "^0.24.0",
+    "esbuild-node-externals": "^1.15.0",
     "esbuild-plugin-entry-chunks": "^0.1.15",
     "esbuild-plugin-extract-helpers": "^0.0.6",
     "esbuild-plugin-hybrid-export": "^0.2.5",
@@ -119,12 +119,12 @@
     "minimist": "^1.2.8",
     "node-fetch-native": "^1.6.4",
     "prettier": "^3.3.3",
-    "size-limit": "^11.1.5",
+    "size-limit": "^11.1.6",
     "ts-node": "^10.9.2",
     "tsd": "^0.31.2",
-    "tsx": "^4.19.1",
-    "typescript": "^5.6.2",
-    "which": "^4.0.0",
+    "tsx": "^4.19.2",
+    "typescript": "^5.6.3",
+    "which": "^5.0.0",
     "yaml": "^2.5.1",
     "zurk": "^0.6.0"
   },