Add api for static initializers

[Lauriichan]

This adds an api to Roaster which allows to add/remove/get static initializers of enums, classes and records.

This should close #237

[gastaldi]

Looks good, but we need some tests also

[Lauriichan]

Okay I have implemented some tests now, please tell me if anything is missing not up to standards :)

[Copilot]

Pull request overview

This PR adds API support for static initializers to Roaster, enabling users to add, retrieve, and remove initializer blocks for Java classes, enums, and records. This addresses issue #237 by introducing a comprehensive initializer management API.

Key changes:

• Introduced new API interfaces (Initializer, InitializerHolder, InitializerSource, InitializerHolderSource) to represent and manage initializer blocks
• Implemented initializer support in JavaClassImpl, JavaEnumImpl, and JavaRecordImpl with methods to add, get, and remove initializers
• Added comprehensive test coverage for initializer functionality across all three Java type implementations

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
api/src/main/java/org/jboss/forge/roaster/model/Initializer.java	New interface defining the base contract for initializer blocks with body retrieval
api/src/main/java/org/jboss/forge/roaster/model/InitializerHolder.java	New interface for types that can contain initializers, providing getInitializers()
api/src/main/java/org/jboss/forge/roaster/model/source/InitializerSource.java	Source-level initializer interface extending Initializer with setBody() capability
api/src/main/java/org/jboss/forge/roaster/model/source/InitializerHolderSource.java	Source-level interface for adding and removing initializers
api/src/main/java/org/jboss/forge/roaster/model/JavaClass.java	Updated to extend InitializerHolder interface
api/src/main/java/org/jboss/forge/roaster/model/JavaEnum.java	Updated to extend InitializerHolder interface
api/src/main/java/org/jboss/forge/roaster/model/JavaRecord.java	Updated to extend InitializerHolder interface
api/src/main/java/org/jboss/forge/roaster/model/source/JavaClassSource.java	Updated to extend InitializerHolderSource interface
api/src/main/java/org/jboss/forge/roaster/model/source/JavaEnumSource.java	Updated to extend InitializerHolderSource interface
api/src/main/java/org/jboss/forge/roaster/model/source/JavaRecordSource.java	Updated to extend InitializerHolderSource interface
impl/src/main/java/org/jboss/forge/roaster/model/impl/InitializerImpl.java	New implementation class handling initializer body parsing, static modifier management, and JavaDoc support
impl/src/main/java/org/jboss/forge/roaster/model/impl/JavaClassImpl.java	Implements initializer management methods for classes
impl/src/main/java/org/jboss/forge/roaster/model/impl/JavaEnumImpl.java	Implements initializer management methods for enums, includes formatting fix
impl/src/main/java/org/jboss/forge/roaster/model/impl/JavaRecordImpl.java	Implements initializer management methods for records
tests/src/test/java/org/jboss/forge/test/roaster/model/JavaClassInitializerTest.java	Tests for class initializer static flag operations
tests/src/test/java/org/jboss/forge/test/roaster/model/JavaEnumInitializerTest.java	Tests for enum initializer static flag operations
tests/src/test/java/org/jboss/forge/test/roaster/model/JavaRecordInitializerTest.java	Tests for record initializer static flag operations
tests/src/test/java/org/jboss/forge/test/roaster/model/InitializerBodyTest.java	Tests for initializer body manipulation including lambdas and complex statements
tests/src/test/java/org/jboss/forge/test/roaster/model/InitializerImplementationTest.java	Tests for initializer validation and error handling

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[gastaldi]

LGTM

[gastaldi]

Thanks! I'll cut a release later today