Add from env (nushell#808)

This adds a little command that allows opening .env files as records.
My implementation removes comments and works with both quoted and
unquoted .env files.

Author: cptpiepmatz

modules/formats/from-env.nu

@@ -0,0 +1,11 @@
+# Converts a .env file into a record
+# may be used like this: open .env | load-env
+# works with quoted and unquoted .env files
+def "from env" []: string -> record {
+  lines 
+    | split column '#' # remove comments
+    | get column1 
+    | parse "{key}={value}"
+    | str trim value -c '"' # unquote values
+    | transpose -r -d
+}