feat: add new encoder and restructure project

.env.example

@@ -1,4 +1,18 @@
 DATABASE_URL=postgresql://user:password@localhost:5432/mydatabase
 
 # [dev, stage, prod]
-ENVIRONMENT=dev
+ENVIRONMENT=dev
+
+### use the below to generate a good salt
+# import secrets
+# print(secrets.token_urlsafe(32))
+###
+HASHIDS_SALT=default-insecure-salt
+
+### use the below to generate alphabet for encoder
+# import random
+# base61 = list("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789")
+# random.shuffle(base61)
+# print("".join(base61))
+###
+ENCODER_ALPHABET=CnArvIseYhld2BtZipybguVKaMx4QFkcR71DTLJEP65jUGzqmw9fSoXW83HNO