**Changes Made:**

1. **Version Update:**
   - Updated all version references from 0.15.0 to 0.16.0 across documentation files
   - Affected files: README-CN.md, README.md, rmqtt/README.md

2. **New Feature Documentation:**
   - Added P2P Messaging plugin to feature lists in both Chinese and English READMEs
   - Added documentation links for P2P Messaging feature:
     * Chinese: `./docs/zh_CN/p2p-messaging.md`
     * English: `./docs/en_US/p2p-messaging.md`

3. **Documentation Structure:**
   - Maintained consistent formatting with existing plugin documentation
   - Added P2P Messaging to the plugin features list alongside other plugins

**Files Modified:**
* README-CN.md - Updated version and added Chinese P2P messaging docs
* README.md - Updated version and added English P2P messaging docs
* rmqtt/README.md - Updated version references in library usage examples

This update prepares for the 0.16.0 release and documents the new P2P messaging capability.

docs: update version to 0.16.0 and add p2p-messaging documentation

Updated the version of rmqtt-net crate to 0.2.0 to reflect API changes and new functionality.

chore(net): bump version from 0.1.5 to 0.2.0

Updated the rmqtt-net workspace dependency from 0.1 to 0.2 to match the recent version bump.

chore(deps): update rmqtt-net dependency to 0.2.0

Added detailed description for the P2P messaging plugin to clearly communicate its functionality:
"An rmqtt plugin that provides point-to-point (P2P) messaging support, enabling direct message delivery between clients using configurable topic patterns."

docs(p2p-messaging): add comprehensive plugin description

Updated rmqtt-conf crate version to 0.2.0 to reflect configuration management system improvements.

chore(conf): bump version from 0.1.1 to 0.2.0

Updated the rmqtt-conf workspace dependency from 0.1 to 0.2 to match the recent version bump.

chore(deps): update rmqtt-conf dependency to 0.2.0

Updated workspace package version and all dependency versions from 0.16.0 to 0.16.1 for a patch release.

chore(deps): pin pulsar dependency to exact version 6.3.1

Added important clarification about caching limitations for subscription ACLs in both English and Chinese documentation:

- **English**: Added "Note: Caching is not supported for subscription ACLs."
- **Chinese**: Added "注意：当前订阅类型的 ACL 不支持缓存。"

Also improved Chinese documentation formatting by using code formatting for header field `X-Cache: -1` and timeout value explanation.

docs(auth-http): add subscription ACL caching limitation note