feat(client): Add bandwidth limit function support

- Implement client bandwidth limitation parameter --bandwidth, supporting 1M, 1MB, 1G and other formats
- Added parseBandwidth function to parse bandwidth values and verify them
- Added bandwidth limit option in HTTP, HTTPS, TCP commands
- Pass bandwidth configuration to the server through protocol
- Add relevant test cases to verify the bandwidth analysis function

feat(server): implements server-side bandwidth limitation function

- Add bandwidth limitation logic in connection processing, using token bucket algorithm
- Implement an effective rate limiting strategy that minimizes the bandwidth of the client and server
- Added QoS limiter and restricted connection wrapper
- Integrated bandwidth throttling in HTTP and WebSocket proxies
- Added global bandwidth limit and burst multiplier settings in server configuration

docs: Updated documentation to describe bandwidth limiting functionality

- Add 2025-02-14 version update instructions in README and README_CN
- Add bandwidth limit function description and usage examples
- Provide client and server configuration examples and parameter descriptions

internal/shared/protocol/messages.go

@@ -29,6 +29,7 @@ type RegisterRequest struct {
 	PoolCapabilities *PoolCapabilities `json:"pool_capabilities,omitempty"`
 	IPAccess         *IPAccessControl  `json:"ip_access,omitempty"`
 	ProxyAuth        *ProxyAuth        `json:"proxy_auth,omitempty"`
+	Bandwidth        int64             `json:"bandwidth,omitempty"`
 }
 
 type RegisterResponse struct {
@@ -39,6 +40,7 @@ type RegisterResponse struct {
 	TunnelID         string `json:"tunnel_id,omitempty"`
 	SupportsDataConn bool   `json:"supports_data_conn,omitempty"`
 	RecommendedConns int    `json:"recommended_conns,omitempty"`
+	Bandwidth        int64  `json:"bandwidth,omitempty"`
 }
 
 type DataConnectRequest struct {