plugins/hunk: init

Add support for [hunk.nvim][1], a plugin for splitting diffs.

Also add myself as a maintainer for it.

[1]: https://github.com/julienvincent/hunk.nvim

tests/test-sources/plugins/by-name/hunk/default.nix

@@ -0,0 +1,94 @@
+{
+  empty = {
+    plugins.hunk.enable = true;
+  };
+
+  with-web-devicons = {
+    plugins.hunk.enable = true;
+    plugins.web-devicons.enable = true;
+  };
+
+  with-mini = {
+    plugins.hunk.enable = true;
+    plugins.mini = {
+      enable = true;
+      modules.icons = { };
+    };
+  };
+
+  example.plugins.hunk = {
+    enable = true;
+    settings = {
+      keys.global.quit = [ "x" ];
+
+      ui = {
+        tree = {
+          mode = "flat";
+          width = 40;
+        };
+        layout = "horizontal";
+      };
+
+      hooks = {
+        on_tree_mount.__raw = "function(_context) end";
+        on_diff_mount.__raw = "function(_context) end";
+      };
+    };
+  };
+
+  # Taken directly from the plugin docs: https://github.com/julienvincent/hunk.nvim#configuration
+  defaults.plugins.hunk = {
+    enable = true;
+    settings = {
+      keys = {
+        global = {
+          quit = [ "q" ];
+          accept = [ "<leader><Cr>" ];
+          focus_tree = [ "<leader>e" ];
+        };
+
+        tree = {
+          expand_node = [
+            "l"
+            "<Right>"
+          ];
+          collapse_node = [
+            "h"
+            "<Left>"
+          ];
+
+          open_file = [ "<Cr>" ];
+
+          toggle_file = [ "a" ];
+        };
+
+        diff = {
+          toggle_line = [ "a" ];
+          toggle_hunk = [ "A" ];
+        };
+      };
+
+      ui = {
+        tree = {
+          mode = "nested";
+          width = 35;
+        };
+        layout = "vertical";
+      };
+
+      icons = {
+        selected = "󰡖";
+        deselected = "";
+        partially_selected = "󰛲";
+
+        folder_open = "";
+        folder_closed = "";
+      };
+
+      hooks = {
+        on_tree_mount.__raw = "function(_context) end";
+        on_diff_mount.__raw = "function(_context) end";
+      };
+    };
+  };
+}