💥 Remove :feature category

:feature was a "catch-all" category. Many of its modules fit better in
other categories, so they've been moved:

- feature/debugger -> tools/debugger
- feature/evil -> editor/evil
- feature/eval -> tools/eval
- feature/lookup -> tools/lookup
- feature/snippets -> editor/snippets
- feature/file-templates -> editor/file-templates
- feature/workspaces -> ui/workspaces

More potential changes in the future:

- A new :term category for terminal emulation modules (eshell, term and
  vterm).
- A new :os category for modules dedicated to os-specific functionality.
  The :tools macos module would fit here, but so would modules for nixos
  and arch.
- A new :services category for web-service integration, like wakatime,
  twitter, elfeed, gist and pastebin services.

modules/editor/file-templates/templates/java-mode/.yas-setup.el

@@ -0,0 +1,9 @@
+(defun yas-java-project-package ()
+  (or (and (eq major-mode 'java-mode)
+           (+java-current-package))
+      ""))
+
+(defun yas-java-class-name ()
+  (or (and (eq major-mode 'java-mode)
+           (+java-current-class))
+      ""))

modules/editor/file-templates/templates/java-mode/__

@@ -0,0 +1,9 @@
+# -*- mode: snippet -*-
+# name: Java file template
+# --
+package `(yas-java-project-package)`;
+
+public class `(yas-java-class-name)` $1
+{
+    $0
+}

modules/editor/file-templates/templates/java-mode/__main

@@ -0,0 +1,11 @@
+# -*- mode: snippet -*-
+# name: Java MAIN file template
+# --
+package `(yas-java-project-package)`;
+
+public class `(yas-java-class-name)` $1
+{
+    public static void main(String[] args) {
+        $0
+    }
+}