Add function to insert types and add yank type at point

- `, i y` Add function to yank type at point but just yank type name without full
package

- `, r a` Add function to insert type for declaration,
see `https://github.com/ensime/ensime-emacs/pull/390/files`

layers/+lang/scala/README.org

@@ -202,6 +202,7 @@ disable it with
 | ~SPC m i i~ | inspect type at point                  |
 | ~SPC m i I~ | inspect type in other frame            |
 | ~SPC m i p~ | inspect project package                |
+| ~SPC m i y~ | yank type at point                     |
 
 *** Server
 
@@ -215,6 +216,7 @@ disable it with
 
 | Key Binding | Description                                                          |
 |-------------+----------------------------------------------------------------------|
+| ~SPC m r a~ | add type annotation                                                  |
 | ~SPC m r f~ | format source                                                        |
 | ~SPC m r d~ | get rid of an intermediate variable (=ensime-refactor-inline-local=) |
 | ~SPC m r D~ | get rid of an intermediate variable (=ensime-undo-peek=)             |

layers/+lang/scala/funcs.el

@@ -101,3 +101,11 @@ point to the position of the join."
 
 (defun scala/configure-flyspell ()
   (setq-local flyspell-generic-check-word-predicate 'scala/flyspell-verify))
+
+(defun scala/yank-type-at-point ()
+  "Yank to kill ring and print type at point to the minibuffer without package name."
+  (interactive)
+  (let* ((type (ensime-rpc-get-type-at-point))
+         (shortname (ensime-type-short-name-with-args type)))
+    (kill-new shortname)
+    (message shortname)))

layers/+lang/scala/packages.el

@@ -141,11 +141,13 @@
         "ii"     'ensime-inspect-type-at-point
         "iI"     'ensime-inspect-type-at-point-other-frame
         "ip"     'ensime-inspect-project-package
+        "iy"     'scala/yank-type-at-point
 
         "nF"     'ensime-reload-open-files
         "ns"     'ensime
         "nS"     'ensime-gen-and-restart
 
+        "ra"     'ensime-refactor-add-type-annotation
         "rd"     'ensime-refactor-diff-inline-local
         "rD"     'ensime-undo-peek
         "rf"     'ensime-format-source