grunt: add page (#1975)

pages/common/grunt.md

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+# grunt
+
+> A JavaScript task runner for automating processes.
+
+- Run the default task process:
+
+`grunt`
+
+- Run one or more specific space-separated task(s):
+
+`grunt {{task_name}}`
+
+- Specify an alternative configuration file:
+
+`grunt --gruntfile {{path/to/file}}`
+
+- Specify an alternative base path for relative files:
+
+`grunt --base {{path/to/directory}}`
+
+- Specify an additional directory to scan for tasks in:
+
+`grunt --tasks {{path/to/directory}}`
+
+- Perform a dry-run without writing any files:
+
+`grunt --no-write`
+
+- List all available options:
+
+`grunt --help`