carp: add page (#6456)

pages/common/carp.md

@@ -0,0 +1,28 @@
+# carp
+
+> REPL and build tool for Carp.
+> More information: <https://carp-lang.github.io/carp-docs/Manual.html>.
+
+- Start a REPL (interactive shell):
+
+`carp`
+
+- Start a REPL with a custom prompt:
+
+`carp --prompt "{{> }}"`
+
+- Build a `carp` file:
+
+`carp -b {{path/to/file.carp}}`
+
+- Build and run a file:
+
+`carp -x {{path/to/file.carp}}`
+
+- Build a file with optimizations enabled:
+
+`carp -b --optimize {{path/to/file.carp}}`
+
+- Transpile a file to C code:
+
+`carp --generate-only {{path/to/file.carp}}`