modules/lsp: init

Co-authored-by: Matt Sturgeon <matt@sturgeon.me.uk>

tests/test-sources/modules/lsp.nix

@@ -0,0 +1,30 @@
+{
+  example = {
+    lsp.servers = {
+      "*".config = {
+        root_markers = [ ".git" ];
+        capabilities.textDocument.semanticTokens = {
+          multilineTokenSupport = true;
+        };
+      };
+      luals.enable = true;
+      clangd = {
+        enable = true;
+        config = {
+          cmd = [
+            "clangd"
+            "--background-index"
+          ];
+          root_markers = [
+            "compile_commands.json"
+            "compile_flags.txt"
+          ];
+          filetypes = [
+            "c"
+            "cpp"
+          ];
+        };
+      };
+    };
+  };
+}