npm-exec: add page, npx: convert to alias (#18127)

* Update npx.md

* Create npm-exec.md

pages/common/npm-exec.md

@@ -0,0 +1,24 @@
+# npm exec
+
+> Execute binaries from `npm` packages.
+> More information: <https://docs.npmjs.com/cli/npm-exec>.
+
+- Execute the command from a local or remote `npm` package:
+
+`npm {{[x|exec]}} {{command}} {{argument1 argument2 ...}}`
+
+- In case multiple commands with the same name exist, it is possible to explicitly specify the package:
+
+`npm {{[x|exec]}} --package {{package}} {{command}}`
+
+- Run a command if it exists in the current path or in `node_modules/.bin`:
+
+`npm {{[x|exec]}} --no-install {{command}} {{argument1 argument2 ...}}`
+
+- Execute a specific command suppressing any output from `npm` itself:
+
+`npm {{[x|exec]}} --quiet {{command}} {{argument1 argument2 ...}}`
+
+- Display help:
+
+`npm {{[x|exec]}} --help`

pages/common/npx.md

@@ -1,24 +1,7 @@
 # npx
 
-> Execute binaries from `npm` packages.
-> More information: <https://github.com/npm/npx>.
+> This command is an alias of `npm exec`.
 
-- Execute the command from a local or remote `npm` package:
+- View documentation for the original command:
 
-`npx {{command}} {{argument1 argument2 ...}}`
-
-- In case multiple commands with the same name exist, it is possible to explicitly specify the package:
-
-`npx --package {{package}} {{command}}`
-
-- Run a command if it exists in the current path or in `node_modules/.bin`:
-
-`npx --no-install {{command}} {{argument1 argument2 ...}}`
-
-- Execute a specific command suppressing any output from `npx` itself:
-
-`npx --quiet {{command}} {{argument1 argument2 ...}}`
-
-- Display help:
-
-`npx --help`
+`tldr npm exec`