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/rules_test.go

@@ -1,46 +0,0 @@
-package rules
-
-import (
-	"testing"
-
-	"github.com/yusing/godoxy/internal/serialization"
-	expect "github.com/yusing/goutils/testing"
-)
-
-func TestParseRule(t *testing.T) {
-	test := []map[string]any{
-		{
-			"name": "test",
-			"on":   "method POST",
-			"do":   "error 403 Forbidden",
-		},
-		{
-			"name": "auth",
-			"on":   `basic_auth "username" "password" | basic_auth username2 "password2" | basic_auth "username3" "password3"`,
-			"do":   "bypass",
-		},
-		{
-			"name": "default",
-			"do":   "require_basic_auth any_realm",
-		},
-	}
-
-	var rules struct {
-		Rules Rules
-	}
-	err := serialization.MapUnmarshalValidate(serialization.SerializedObject{"rules": test}, &rules)
-	expect.NoError(t, err)
-	expect.Equal(t, len(rules.Rules), len(test))
-	expect.Equal(t, rules.Rules[0].Name, "test")
-	expect.Equal(t, rules.Rules[0].On.String(), "method POST")
-	expect.Equal(t, rules.Rules[0].Do.String(), "error 403 Forbidden")
-
-	expect.Equal(t, rules.Rules[1].Name, "auth")
-	expect.Equal(t, rules.Rules[1].On.String(), `basic_auth "username" "password" | basic_auth username2 "password2" | basic_auth "username3" "password3"`)
-	expect.Equal(t, rules.Rules[1].Do.String(), "bypass")
-
-	expect.Equal(t, rules.Rules[2].Name, "default")
-	expect.Equal(t, rules.Rules[2].Do.String(), "require_basic_auth any_realm")
-}
-
-// TODO: real tests.