Add PFL and PFH files.

src/main/decoder/decode-pfh.interface.ts

@@ -0,0 +1,15 @@
+export interface DecodedPfh {
+  tax_prethr: number;
+  tax_thr_amt?: number;
+  tax_pstthr?: number;
+  tax_tow_rt: number;
+  tax_str_rt: number;
+  tax_sub_rt: number;
+  tax_lbr_rt: number;
+  federal_tax_rate: number;
+  adj_g_disc?: number;
+  adj_towdis?: number;
+  adj_strdis?: number;
+  tax_predis?: number;
+  tax_gst_rt?: number;
+}