docs: add section on small DX wins (closes #1310)

docs/book/src/SUMMARY.md

@@ -47,3 +47,4 @@
 - [Deployment](./deployment.md)
 - [Appendix: How Does the Reactive System Work?](./appendix_reactive_graph.md)
 - [Appendix: Optimizing WASM Binary Size](./appendix_binary_size.md)
+- [Appendix: Some Small DX Improvements](./appending_dx.md)

docs/book/src/appendix_dx.md

@@ -0,0 +1,49 @@
+# A Running List of Small Developer Experience Improvements
+
+## Autocompletion inside `#[component]` and `#[server]`
+
+Because of the nature of macros (they can expand from anything to anything, but only if the input is exactly correct at that instant) it can be hard for rust-analyzer to do proper autocompletion and other support.
+
+But you can tell rust-analyzer to ignore certain proc macros. For `#[component]` and `#[server]` especially, which annotate function bodies but don't actually transform anything inside the body of your function, this can be really helpful.
+
+Note that this means that rust-analyzer doesn't know about your component props, which may generate its own set of errors or warnings in the IDE.
+
+VSCode `settings.json`:
+
+```json
+"rust-analyzer.procMacro.ignored": {
+	"leptos_macro": [
+		"server",
+		"component"
+	],
+}
+```
+
+neovim with lspconfig:
+
+```lua
+require('lspconfig').rust_analyzer.setup {
+  -- Other Configs ...
+  settings = {
+    ["rust-analyzer"] = {
+      -- Other Settings ...
+      procMacro = {
+        ignored = {
+            leptos_macro = {
+                "server",
+                "component",
+            },
+        },
+      },
+    },
+  }
+}
+```
+
+Helix, in `.helix/languages.toml`:
+
+```toml
+[[language]]
+name = "rust"
+config = { procMacro = {ignored = {leptos_macro = ["component"]}}}
+```