A simple .env file loader
Giving a sequence of env files from most general to most specific.
Parse each file for key val remove any comments blank lines and extra whitespace.
```rust TEST_DATA=bar # spaces are optional
TEST_baz = "baz" # double quotes are removed
``` will produce:
|Key|Value|
|---|---|
TEST_DATA
|bar
TEST_baz
|baz
License: 0BSD