rga: add page (#7818)

pages/common/rga.md

@@ -0,0 +1,24 @@
+# rga
+
+> Ripgrep wrapper with rich file type searching capabilities.
+> More information: <https://github.com/phiresky/ripgrep-all>.
+
+- Search recursively for a pattern in all files in the current directory:
+
+`rga {{regular_expression}}`
+
+- List available adapters:
+
+`rga --rga-list-adapters`
+
+- Change which adapters to use (e.g. ffmpeg, pandoc, poppler etc.):
+
+`rga --rga-adapters={{adapter1,adapter2}} {{regular_expression}}`
+
+- Search for a pattern using the mime type instead of the file extension (slower):
+
+`rga --rga-accurate {{regular_expression}}`
+
+- Display detailed help:
+
+`rga --help`