ast-grep: add page (#21517)

Co-authored-by: Dylan <145150333+dmmqz@users.noreply.github.com>

pages/common/ast-grep.md

@@ -0,0 +1,28 @@
+# ast-grep
+
+> Search, lint, and rewrite code using AST patterns.
+> More information: <https://ast-grep.github.io/reference/cli.html>.
+
+- Search for a pattern in files:
+
+`ast-grep run {{[-p|--pattern]}} '{{pattern}}' {{path/to/file}}`
+
+- Search for a pattern in a specific language:
+
+`ast-grep run {{[-p|--pattern]}} '{{pattern}}' {{[-l|--lang]}} {{python}} {{path/to/directory}}`
+
+- Rewrite code matching a pattern:
+
+`ast-grep run {{[-p|--pattern]}} '{{pattern}}' {{[-r|--rewrite]}} '{{replacement}}' {{path/to/file}}`
+
+- Run rules from a configuration file:
+
+`ast-grep scan {{[-r|--rule]}} {{path/to/rule.yml}} {{path/to/directory}}`
+
+- Interactively search and rewrite code:
+
+`ast-grep run {{[-p|--pattern]}} '{{pattern}}' {{[-i|--interactive]}} {{path/to/directory}}`
+
+- Display help for a subcommand:
+
+`ast-grep {{run}} {{[-h|--help]}}`