feat(core): Add changelog fetching and parsing functionality

ts/interfaces/index.ts

@@ -1,37 +1,37 @@
-export interface RepositoryOwner {
+export interface IRepositoryOwner {
   login: string;
 }
 
-export interface Repository {
-  owner: RepositoryOwner;
+export interface IRepository {
+  owner: IRepositoryOwner;
   name: string;
 }
 
-export interface CommitAuthor {
+export interface ICommitAuthor {
   date: string;
 }
 
-export interface CommitDetail {
+export interface ICommitDetail {
   message: string;
-  author: CommitAuthor;
+  author: ICommitAuthor;
 }
 
-export interface Commit {
+export interface ICommit {
   sha: string;
-  commit: CommitDetail;
+  commit: ICommitDetail;
 }
 
-export interface Tag {
+export interface ITag {
   commit?: {
     sha?: string;
   };
 }
 
-export interface RepoSearchResponse {
-  data: Repository[];
+export interface IRepoSearchResponse {
+  data: IRepository[];
 }
 
-export interface CommitResult {
+export interface ICommitResult {
   baseUrl: string;
   org: string;
   repo: string;
@@ -41,4 +41,5 @@ export interface CommitResult {
   tagged: boolean;
   publishedOnNpm: boolean;
   prettyAgoTime: string;
+  changelog: string | undefined;
 }