lsp-mode: Move rust-mode config for lsp-mode to rust config

To decouple rust from the dev config and contain it solely in the rust
config, configure the lsp-mode for rust in the rust config.

.emacs.d/config/dev.el

@@ -48,7 +48,6 @@
 
 (use-package lsp-mode
   :ensure t
-  :hook
-  (python-mode . lsp-deferred)
-  (rust-mode . lsp-deferred)
-  (toml-mode . lsp-deferred))
+  :config
+  (lsp-inlay-hints-mode)
+  (setq lsp-inlay-hint-enable t))

.emacs.d/config/python.el

@@ -5,3 +5,8 @@
   :ensure t
   :hook
   (python-mode . flycheck-mode))
+
+(use-package lsp-mode
+  :ensure t
+  :hook
+  (python-mode . lsp-deferred))

.emacs.d/config/rust.el

@@ -10,5 +10,11 @@
   ;; format code when saving
   (setq rust-format-on-save t))
 
+(use-package lsp-mode
+  :ensure t
+  :hook
+  (rust-mode . lsp-deferred)
+  (toml-mode . lsp-deferred))
+
 (use-package flycheck-rust :ensure t)
 (use-package toml-mode :ensure t)