refactor(middleware): replace path prefix checks with function-based approach

Replace simple path prefix-based enforcement/bypass mechanism with a more
flexible function-based approach. This allows for more complex conditions
to determine when middleware should be enforced or bypassed.

- Add checkReqFunc and checkRespFunc types for flexible condition checking
- Replace enforcedPathPrefixes with separate enforce and bypass check functions
- Add static asset path detection for automatic bypassing
- Separate request and response check logic for better granularity

internal/net/gphttp/middleware/oidc.go

@@ -28,6 +28,10 @@ type oidcMiddleware struct {
 
 var OIDC = NewMiddleware[oidcMiddleware]()
 
+func isOIDCAuthPath(r *http.Request) bool {
+	return strings.HasPrefix(r.URL.Path, auth.OIDCAuthBasePath)
+}
+
 func (amw *oidcMiddleware) finalize() error {
 	if !auth.IsOIDCEnabled() {
 		log.Error().Msg("OIDC not enabled but OIDC middleware is used")