feat: initial gitea shunt rules generator

config.example.toml

@@ -0,0 +1,18 @@
+[gitea]
+base_url = "https://gitea.example.com"
+owner = "rules"
+repo = "ios_rule_script"
+ref = "main"
+token_env = "GITEA_TOKEN"
+
+[source]
+# Usually this is where Surge source rules are stored in your Gitea repo.
+root = "rule/Surge"
+filename_pattern = "{name}.list"
+include_categories = []
+exclude_categories = []
+
+[output]
+dir = "dist"
+# true: IP-CIDR/IP-CIDR6 in Clash payload include no-resolve
+clash_no_resolve = false