chore: rework directory structure

Signed-off-by: Matej Focko <me@mfocko.xyz>

roles/user/lang/haskell/tasks/install.yml

@@ -0,0 +1,6 @@
+---
+- name: Install GHC
+  ansible.builtin.package:
+    name: ghc
+    state: present
+  become: true

roles/user/lang/haskell/tasks/main.yml

@@ -0,0 +1,16 @@
+---
+- name: Packages
+  ansible.builtin.include_tasks: install.yml
+  tags: install
+
+- name: Create directory for GHC config
+  ansible.builtin.file:
+    path: ~/.ghc
+    state: directory
+    mode: 0740
+
+- name: Install ghci.conf
+  ansible.builtin.copy:
+    src: files/ghci.conf
+    dest: ~/.ghc/ghci.conf
+    mode: 0640