feat(fish): migrate some utils to fish functions

fish/conf.d/functions.fish

@@ -0,0 +1,27 @@
+function cleanpycs
+    find . -name '.git' -o -name __pycache__ -delete
+    find . -name '.git' -o -name '*.py[co]' -delete
+end
+
+function envsource
+  if not set -q argv[1]
+    set argv[1] ".env"
+  end
+
+  echo "Using $argv[1] as input file"
+
+  for line in (grep -v '^\s*\(#\|$\)' $argv[1] | grep -E '^[A-Za-z_]+=[^#\n]+')
+    set item (string split -m 1 '=' $line)
+    set -gx $item[1] $item[2]
+    echo "Exported key $item[1]"
+  end
+end
+
+
+function gen-secret
+    if not set -q argv[1]
+        set argv[1] 64
+    end
+
+    openssl rand -hex $argv[1]
+end