feat: support remove package

Author: obetomuniz

README.md

@@ -1,6 +1,6 @@
 # Import Maps Command Line Interface
 
-A command-line utility for managing [JavaScript import maps](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script/type/importmap) dependencies. 
+A command-line utility for managing [JavaScript import maps](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script/type/importmap) dependencies.
 
 <img width="80%" alt="Screenshot 2023-04-01 at 00 54 27" src="https://user-images.githubusercontent.com/1680157/229265234-f5120ec8-28cb-4cce-9303-444b076ec032.png">
 
@@ -10,7 +10,6 @@ This utility uses the [esm.sh](https://esm.sh) CDN to fetch package information
 
 To install `im-cli` globally, run the following command:
 
-
 ```bash
 npm install -g im-cli
 ```
@@ -45,12 +44,12 @@ To update the `lodash` package to the latest version, run:
 im update lodash
 ```
 
-### Deleting a package
+### Removing a package
 
 To remove the `lodash` package from your import map JSON file, run:
 
 ```bash
-im delete lodash
+im remove lodash
 ```
 
 ### Displaying help

im.json

@@ -1,6 +1,5 @@
 {
   "imports": {
-    "lodash": "https://esm.sh/[email protected]",
-    "moment": "https://esm.sh/[email protected]"
+    "lodash": "https://esm.sh/[email protected]"
   }
 }

lib/im-cli.ts

@@ -60,8 +60,23 @@ async function addOrUpdatePackage(
   )
 }
 
-function deletePackage(packageName: string): void {
-  // ...
+function removePackage(packageName: string): void {
+  if (!fs.existsSync(importMapFile)) {
+    console.error("im.json file not found.")
+    return
+  }
+
+  const fileContent = fs.readFileSync(importMapFile, "utf8")
+  const importMap = JSON.parse(fileContent)
+
+  if (!importMap.imports[packageName]) {
+    console.error(`Package ${packageName} not found in im.json.`)
+    return
+  }
+
+  delete importMap.imports[packageName]
+  fs.writeFileSync(importMapFile, JSON.stringify(importMap, null, 2))
+  console.log(`Package ${packageName} removed from im.json`)
 }
 
 function displayHelp(): void {
@@ -73,7 +88,7 @@ function displayHelp(): void {
     "  im update <package-name>             Update a package in the import map"
   )
   console.log(
-    "  im delete <package-name>             Delete a package from the import map"
+    "  im remove <package-name>             Remove a package from the import map"
   )
   console.log(
     "  im help                              Display this help message"
@@ -88,9 +103,9 @@ function displayHelp(): void {
         await addOrUpdatePackage(packageArg, command === "update")
       }
       break
-    case "delete":
+    case "remove":
       if (packageArg) {
-        deletePackage(packageArg)
+        removePackage(packageArg)
       }
       break
     case "help":