feat(apisix): add Cloudron package

- Implements Apache APISIX packaging for Cloudron platform.
- Includes Dockerfile, CloudronManifest.json, and start.sh.
- Configured to use Cloudron's etcd addon.

🤖 Generated with Gemini CLI
Co-Authored-By: Gemini <noreply@google.com>

CloudronPackages/APISIX/apisix-source/apisix/plugins/attach-consumer-label.lua

@@ -0,0 +1,68 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one or more
+-- contributor license agreements.  See the NOTICE file distributed with
+-- this work for additional information regarding copyright ownership.
+-- The ASF licenses this file to You under the Apache License, Version 2.0
+-- (the "License"); you may not use this file except in compliance with
+-- the License.  You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+
+local core = require("apisix.core")
+local pairs = pairs
+local plugin_name = "attach-consumer-label"
+
+local schema = {
+    type = "object",
+    properties = {
+        headers = {
+            type = "object",
+            additionalProperties = {
+                type = "string",
+                pattern = "^\\$.*"
+            },
+            minProperties = 1
+        },
+    },
+    required = {"headers"},
+}
+
+local _M = {
+    version = 0.1,
+    priority = 2399,
+    name = plugin_name,
+    schema = schema,
+}
+
+function _M.check_schema(conf)
+    return core.schema.check(schema, conf)
+end
+
+function _M.before_proxy(conf, ctx)
+    -- check if the consumer is exists in the context
+    if not ctx.consumer then
+        return
+    end
+
+    local labels = ctx.consumer.labels
+    core.log.info("consumer username: ", ctx.consumer.username, " labels: ",
+            core.json.delay_encode(labels))
+    if not labels then
+        return
+    end
+
+    for header, label_key in pairs(conf.headers) do
+        -- remove leading $ character
+        local label_value = labels[label_key:sub(2)]
+        core.request.set_header(ctx, header, label_value)
+    end
+end
+
+return _M