Add Close Frame Record return type support

[chathushkaayash]

Purpose

$subject

Resolves Add support for websocket close frame

Examples

1. Close the connection using NormalClosure

remote function onMessage(websocket:Caller caller, string data) returns websocket:NormalClosure {
    // ... omitted for brevity
    return websocket:NORMAL_CLOSURE;
}

2. Close the connection using CustomCloseFrame

remote function onMessage(websocket:Caller caller, string data) returns websocket:CustomCloseFrame {
    // ... omitted for brevity
    return {status: 3555, reason: "Custom close frame message"};
}

Checklist

• Linked to an issue
• Updated the specification
• Updated the changelog
• Added tests
• Checked native-image compatibility

[codecov]

Codecov Report

Attention: Patch coverage is 83.01887% with 9 lines in your changes missing coverage. Please review.

Project coverage is 82.37%. Comparing base (2d73a97) to head (43701ea).
Report is 64 commits behind head on main.

Files with missing lines	Patch %	Lines
...na/stdlib/websocket/WebSocketResourceCallback.java	78.94%	4 Missing and 4 partials ⚠️
...a/io/ballerina/stdlib/websocket/WebSocketUtil.java	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1497      +/-   ##
============================================
+ Coverage     82.32%   82.37%   +0.04%     
- Complexity      575      591      +16     
============================================
  Files            48       48              
  Lines          3015     3063      +48     
  Branches        393      404      +11     
============================================
+ Hits           2482     2523      +41     
- Misses          393      397       +4     
- Partials        140      143       +3     

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[ayeshLK]

LGTM

[sonarqubecloud]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud