feat(core): Refactor TypeScript interfaces and improve module exports

ts/interfaces/index.ts

@@ -0,0 +1,44 @@
+export interface RepositoryOwner {
+  login: string;
+}
+
+export interface Repository {
+  owner: RepositoryOwner;
+  name: string;
+}
+
+export interface CommitAuthor {
+  date: string;
+}
+
+export interface CommitDetail {
+  message: string;
+  author: CommitAuthor;
+}
+
+export interface Commit {
+  sha: string;
+  commit: CommitDetail;
+}
+
+export interface Tag {
+  commit?: {
+    sha?: string;
+  };
+}
+
+export interface RepoSearchResponse {
+  data: Repository[];
+}
+
+export interface CommitResult {
+  baseUrl: string;
+  org: string;
+  repo: string;
+  timestamp: string;
+  hash: string;
+  commitMessage: string;
+  tagged: boolean;
+  publishedOnNpm: boolean;
+  prettyAgoTime: string;
+}