Merge pull request rust-lang#19157 from joshrotenberg/dev-guide-to-book

doc: move dev docs to manual

Author: Veykril

src/tools/rust-analyzer/CONTRIBUTING.md

@@ -4,7 +4,7 @@ Thank you for your interest in contributing to rust-analyzer! There are many way
 and we appreciate all of them.
 
 To get a quick overview of the crates and structure of the project take a look at the
-[./docs/dev](./docs/dev) folder.
+[Contributing](https://rust-analyzer.github.io/book/contributing) section of the manual.
 
 If you have any questions please ask them in the [rust-analyzer zulip stream](
 https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer) or if unsure where

src/tools/rust-analyzer/README.md

@@ -14,8 +14,8 @@ https://rust-analyzer.github.io/book/installation.html
 ## Documentation
 
 If you want to **contribute** to rust-analyzer check out the [CONTRIBUTING.md](./CONTRIBUTING.md) or
-if you are just curious about how things work under the hood, check the [./docs/dev](./docs/dev)
-folder.
+if you are just curious about how things work under the hood, see the
+[Contributing](https://rust-analyzer.github.io/book/contributing) section of the manual.
 
 If you want to **use** rust-analyzer's language server with your editor of
 choice, check [the manual](https://rust-analyzer.github.io/book/).

src/tools/rust-analyzer/docs/book/book.toml

@@ -34,3 +34,8 @@ use-boolean-and = true
 [output.html.fold]
 enable = true
 level = 3
+
+[preprocessor.toc]
+command = "mdbook-toc"
+renderer = ["html"]
+max-level = 3

src/tools/rust-analyzer/docs/book/src/SUMMARY.md

@@ -14,3 +14,11 @@
   - [Assists (Code Actions)](assists.md)
   - [Diagnostics](diagnostics.md)
 - [Editor Features](editor_features.md)
+- [Contributing](contributing/README.md)
+  - [Architecture](contributing/architecture.md)
+  - [Debugging](contributing/debugging.md)
+  - [Guide](contributing/guide.md)
+  - [LSP Extensions](contributing/lsp-extensions.md)
+  - [Setup](contributing/setup.md)
+  - [Style](contributing/style.md)
+  - [Syntax](contributing/syntax.md)