Mention code generation from the main project README.

Author: bitshifter

ARCHITECTURE.md

@@ -81,4 +81,6 @@ getting methods to read and write component values.
 
 ## Code generation
 
-See [codegen/README.md] for information on `glam`'s code generation process.
+See the [codegen README] for information on `glam`'s code generation process.
+
+[codegen README]: codegen/README.md

CONTRIBUTING.md

@@ -55,5 +55,4 @@ Also run `cargo fmt` and `cargo clippy` on any new code.
 [open an issue]: https://GitHub.com/bitshifter/glam-rs/issues/new
 [ask a question]: https://github.com/bitshifter/glam-rs/discussions/new?category=q-a
 [suggest a new feature]: https://github.com/bitshifter/glam-rs/discussions/new?category=ideas
-[ARCHITECTURE]: ARCHITECTURE.md
 [codegen README]: codegen/README.md

README.md

@@ -215,23 +215,26 @@ Unless you explicitly state otherwise, any contribution intentionally submitted
 for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
 dual licensed as above, without any additional terms or conditions.
 
+If you are interested in contributing or have a request or suggestion
+[start a discussion] on GitHub. See [CONTRIBUTING.md] for more information for
+contributors.
+
+Most code in `glam` is generated, see the [codegen README] for details.
+
 Thank you to all of the `glam` [contributors]!
 
 [Code of Conduct]: https://www.rust-lang.org/en-US/conduct.html
+[start a discussion]: https://github.com/bitshifter/glam-rs/discussions
+[CONTRIBUTING.md]: CONTRIBUTING.md
+[codegen README]: codegen/README.md
 [contributors]: https://github.com/bitshifter/glam-rs/graphs/contributors
 
 ## Support
 
-If you are interested in contributing or have a request or suggestion
-[start a discussion] on GitHub. See [CONTRIBUTING.md] for more information for
-contributors.
-
 The [Game Development in Rust Discord] and [Bevy Engine Discord] servers are
 not official support channels but can be good places to ask for help with
 `glam`.
 
-[start a discussion]: https://github.com/bitshifter/glam-rs/discussions
-[CONTRIBUTING.md]: CONTRIBUTING.md
 [Game Development in Rust Discord]: https://discord.gg/yNtPTb2
 [Bevy Engine Discord]: https://discord.gg/gMUk5Ph