Add vim-rails projections for request specs

Enables using `alternate` and `test` between Rails controller files and
associated RSpec request specs.

Based on tpope/vim-rails#368 (comment)

config/nvim/init.lua

@@ -12,4 +12,5 @@ require "user.gitsigns"
 require "user.null-ls"
 require "user.autocommands"
 require "user.lualine"
+require "user.vim-rails"
 require "user.plugin-setups"

config/nvim/lua/user/vim-rails.lua

@@ -0,0 +1,18 @@
+vim.g.rails_projections = {
+  ["app/controllers/*_controller.rb"] = {
+    ["test"] = {
+      "spec/requests/{}_spec.rb",
+      "spec/controllers/{}_controller_spec.rb",
+      "test/controllers/{}_controller_test.rb"
+    },
+    ["alternate"] = {
+      "spec/requests/{}_spec.rb",
+      "spec/controllers/{}_controller_spec.rb",
+      "test/controllers/{}_controller_test.rb"
+    },
+  },
+  ["spec/requests/*_spec.rb"] = {
+    ["command"] = "request",
+    ["alternate"] = "app/controllers/{}_controller.rb",
+  },
+}

makesymlinks.sh

@@ -26,6 +26,7 @@ files="
   config/nvim/lua/user/null-ls.lua
   config/nvim/lua/user/autocommands.lua
   config/nvim/lua/user/lualine.lua
+  config/nvim/lua/user/vim-rails.lua
   config/nvim/lua/user/plugin-setups.lua
   config/starship.toml
   rbenv/default-gems