feat(nix): nix and back again

I tried Nix, but it had too many downsides so I removed it.

1. Didn't like that all files are immutable and simple config changes
need a complete rebuild.
2. Setting up a new Mac didn't work as smoothly as promised. Not worth
the effort.
3. It sucked a lot to always have to type in the password twice on each
darwin-rebuild
4. It solves problems I never had.

.config/gh-dash/config.yml

@@ -0,0 +1,60 @@
+prSections:
+  - title: My Pull Requests
+    filters: is:open author:@me
+  - title: Needs My Review
+    filters: is:open review-requested:@me
+  - title: Involved
+    filters: is:open involves:@me -author:@me
+issuesSections:
+  - title: My Issues
+    filters: is:open author:@me
+  - title: Assigned
+    filters: is:open assignee:@me
+  - title: Involved
+    filters: is:open involves:@me -author:@me
+defaults:
+  preview:
+    open: true
+    width: 50
+  prsLimit: 20
+  issuesLimit: 20
+  view: prs
+  layout:
+    prs:
+      updatedAt:
+        width: 7
+      repo:
+        width: 15
+      author:
+        width: 15
+      assignees:
+        width: 20
+        hidden: true
+      base:
+        width: 15
+        hidden: true
+      lines:
+        width: 16
+    issues:
+      updatedAt:
+        width: 7
+      repo:
+        width: 15
+      creator:
+        width: 10
+      assignees:
+        width: 20
+        hidden: true
+  refetchIntervalMinutes: 30
+keybindings:
+  issues: []
+  prs: []
+repoPaths:
+  kogakure/*: ~/Code/GitHub/*
+  work/*: ~/Code/XING/*
+theme:
+  ui:
+    table:
+      showSeparator: true
+pager:
+  diff: ""