feat(rules): add post-request rules system with response manipulation (#160)

* Add comprehensive post-request rules support for response phase
* Enable response body, status, and header manipulation via set commands
* Refactor command handlers to support both request and response phases
* Implement response modifier system for post-request template execution
* Support response-based rule matching with status and header checks
* Add comprehensive benchmarks for matcher performance
* Refactor authentication and proxying commands for unified error handling
* Support negated conditions with !
* Enhance error handling, error formatting and validation
* Routes: add `rule_file` field with rule preset support
* Environment variable substitution: now supports variables without `GODOXY_` prefix

* new conditions:
  * `on resp_header <key> [<value>]`
  * `on status <status>`
* new commands:
  * `require_auth`
  * `set resp_header <key> <template>`
  * `set resp_body <template>`
  * `set status <code>`
  * `log <level> <path> <template>`
  * `notify <level> <provider> <title_template> <body_template>`

internal/route/rules/presets/webui.yml

@@ -0,0 +1,17 @@
+- name: login page
+  on: path /login
+  do: pass
+- name: protected
+  on: |
+    !path regex("(_next/static|_next/image|favicon.ico).*")
+    !path glob("/api/v1/auth/*")
+    !path /api/v1/version
+  do: require_auth
+- name: proxy to backend
+  on: path glob("/api/v1/*")
+  do: proxy http://${API_ADDR}/
+- name: proxy to auth api
+  on: path glob("/auth/*")
+  do: |
+    rewrite /auth /api/v1/auth
+    proxy http://${API_ADDR}/