chore: add solargraph support

Author: ffloyd

.solargraph.yml

@@ -0,0 +1,23 @@
+---
+include:
+- "**/*.rb"
+exclude:
+- spec/**/*
+- test/**/*
+- vendor/**/*
+- ".bundle/**/*"
+- ".env/**/*"
+require: []
+domains: []
+reporters:
+- rubocop
+- require_not_found
+formatter:
+  rubocop:
+    cops: safe
+    except: []
+    only: []
+    extra_args: []
+require_paths: []
+plugins: []
+max_files: 5000

flake.nix

@@ -18,7 +18,7 @@
 
       devShell = pkgs.mkShell {
         packages = with pkgs; [
-          ruby_3_3
+          (ruby_3_3.withPackages (p: with p; [solargraph]))
           lefthook
         ];