add all crates to crate.md (book)

docs/book/src/crate.md

@@ -13,6 +13,32 @@ cargo add rama
     * Edge (main branch): <https://ramaproxy.org/docs/rama/index.html>
 * Github repo: <https://github.com/plabayo/rama>
 
+## All Rama Crates
+
+The `rama` crate can be used as the one and only dependency.
+However, as you can also read in the "DIY" chapter of the book
+at <https://ramaproxy.org/book/diy.html#empowering>, you are able
+to pick and choose not only what specific parts of `rama` you wish to use,
+but also in fact what specific (sub) crates.
+
+Here is a list of all `rama` crates:
+
+- [`rama`](https://crates.io/crates/rama): one crate to rule them all
+- [`rama-error`](https://crates.io/crates/rama-error): error utilities for rama and its users
+- [`rama-macros`](https://crates.io/crates/rama-macros): contains the procedural macros used by `rama`
+- [`rama-utils`](https://crates.io/crates/rama-utils): utilities crate for rama
+- [`rama-core`](https://crates.io/crates/rama-core): core crate containing the service, layer and
+  context used by all other `rama` code, as well as some other _core_ utilities
+- [`rama-net`](https://crates.io/crates/rama-net): rama network types and utilities
+- [`rama-tcp`](https://crates.io/crates/rama-tcp): TCP support for rama
+- [`rama-tls`](https://crates.io/crates/rama-tls): TLS support for rama (types, `rustls` and `boring`)
+- [`rama-proxy`](https://crates.io/crates/rama-proxy): proxy types and utilities for rama
+- [`rama-haproxy`](https://crates.io/crates/rama-haproxy): rama HaProxy support
+- [`rama-ua`](https://crates.io/crates/rama-ua): User-Agent (UA) support for `rama`
+- [`rama-http-types`](https://crates.io/crates/rama-http-types): http types and utilities
+- [`rama-http`](https://crates.io/crates/rama-http): rama http services, layers and utilities
+- [`rama-http-backend`](https://crates.io/crates/rama-http-backend): default http backend for `rama`
+
 ## Examples
 
 Examples to help you get started can be found in