♻️ split up workflows

.github/workflows/test_codespaces_install.yml

@@ -0,0 +1,16 @@
+on:
+  push:
+    paths:
+      - install.sh
+      - install_tmux.sh
+      - install_nvim.sh
+      - install_fzf.sh
+      - install_fish.sh
+
+jobs:
+  install_codespaces_setup:
+    name: install codespaces setup
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - run: bash install.sh