feat(nvim): re-add projectionist.vim

Re-add `projectionist.vim` with a minimal configuration for setting the
alternate file in basic PHP library or TypeScript projects.

config/neovim/after/plugin/projectionist.lua

@@ -0,0 +1,42 @@
+vim.g.projectionist_heuristics = {
+  ["composer.json"] = {
+    ["src/*.php"] = {
+      type = "source",
+      alternate = "tests/{}Test.php",
+    },
+
+    ["src/Controller/*.php"] = {
+      type = "controller",
+    },
+
+    ["src/Model/*.php"] = {
+      type = "model",
+    },
+
+    ["src/Service/*.php"] = {
+      type = "service",
+    },
+
+    ["tests/*Test.php"] = {
+      type = "test",
+      alternate = "src/{}.php",
+    },
+  },
+
+  ["package.json"] = {
+    ["src/*.ts"] = {
+      type = "source",
+      alternate = "tests/{}.test.ts",
+    },
+
+    ["src/*.service.ts"] = {
+      type = "source",
+      alternate = "tests/{}.test.ts",
+    },
+
+    ["tests/*.test.ts"] = {
+      type = "test",
+      alternate = "src/{}.ts",
+    },
+  },
+}

system/shared/home-manager.nix

@@ -532,6 +532,7 @@ in
       vimPlugins.vim-obsession
       vimPlugins.vim-pasta
       vimPlugins.vim-polyglot
+      vimPlugins.vim-projectionist
       vimPlugins.vim-repeat
       vimPlugins.vim-sleuth
       vimPlugins.vim-sort-motion