feat(client): add rich domain classes, helpers, and refactor GitLabClient internals

ts/index.ts

@@ -1,4 +1,21 @@
+// Main client
 export { GitLabClient } from './gitlab.classes.gitlabclient.js';
+
+// Domain classes
+export { GitLabGroup } from './gitlab.classes.group.js';
+export { GitLabProject } from './gitlab.classes.project.js';
+export { GitLabPipeline } from './gitlab.classes.pipeline.js';
+export { GitLabJob } from './gitlab.classes.job.js';
+export { GitLabBranch } from './gitlab.classes.branch.js';
+export { GitLabTag } from './gitlab.classes.tag.js';
+export { GitLabProtectedBranch } from './gitlab.classes.protectedbranch.js';
+export { GitLabVariable, GitLabPipelineVariable } from './gitlab.classes.variable.js';
+export { GitLabTestReport, GitLabTestSuite, GitLabTestCase } from './gitlab.classes.testreport.js';
+
+// Helpers
+export { autoPaginate } from './gitlab.helpers.js';
+
+// Interfaces (raw API types)
 export type {
   IGitLabUser,
   IGitLabProject,
@@ -19,4 +36,6 @@ export type {
   IPipelineListOptions,
   IJobListOptions,
 } from './gitlab.interfaces.js';
+
+// Commit info
 export { commitinfo } from './00_commitinfo_data.js';