fix(build): modernize project configuration and tighten Node.js typing support

ts/smartgit.classes.smartgit.ts

@@ -1,9 +1,11 @@
 import * as plugins from './smartgit.plugins.js';
 import { GitRepo } from './smartgit.classes.gitrepo.js';
 
+type TNodeFs = typeof import('node:fs');
+
 interface IEnvDeps {
-  fs: typeof import('fs') | null;
-  http: any | null; // isomorphic-git http interface
+  fs?: TNodeFs;
+  http?: plugins.HttpClient;
 }
 
 /**
@@ -13,8 +15,8 @@ interface IEnvDeps {
 export class Smartgit {
   public smartenvInstance = new plugins.smartenv.Smartenv();
   public envDeps: IEnvDeps = {
-    fs: null,
-    http: null,
+    fs: undefined,
+    http: undefined,
   };
 
   /**
@@ -24,8 +26,8 @@ export class Smartgit {
   public async init(): Promise<void> {
     try {
       if (this.smartenvInstance.isNode) {
-        this.envDeps.fs = await this.smartenvInstance.getSafeNodeModule('fs');
-        this.envDeps.http = await this.smartenvInstance.getSafeNodeModule(
+        this.envDeps.fs = await this.smartenvInstance.getSafeNodeModule<TNodeFs>('fs');
+        this.envDeps.http = await this.smartenvInstance.getSafeNodeModule<plugins.HttpClient>(
           'isomorphic-git/http/node'
         );
       } else {
@@ -42,6 +44,22 @@ export class Smartgit {
     }
   }
 
+  public get fs(): TNodeFs {
+    const fs = this.envDeps.fs;
+    if (!fs) {
+      throw new Error('Smartgit must be initialized before use. Call init() first.');
+    }
+    return fs;
+  }
+
+  public get http(): plugins.HttpClient {
+    const http = this.envDeps.http;
+    if (!http) {
+      throw new Error('Smartgit must be initialized before use. Call init() first.');
+    }
+    return http;
+  }
+
   /**
    * creates a new GitRepo instance by cloning from a remote URL
    * @param fromUrlArg the URL to clone from