Draft: Toml (#1439)

* toml wip

* wip

* Fixed auto parsing toml

* Added build flag not to include toml

* Parse toml docs and tests

* minor updates

pkg/yqlib/no_toml.go

@@ -0,0 +1,7 @@
+//go:build yq_notoml
+
+package yqlib
+
+func NewTomlDecoder() Decoder {
+	return nil
+}