Fix README template file extensions: use ts/js instead of typescript/javascript (#327)

* Initial plan

* Fix README template to use correct file extensions (ts/js) instead of full language names

Co-authored-by: RetricSu <23436060+RetricSu@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: RetricSu <23436060+RetricSu@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -7,3 +7,4 @@ dist/
 .vscode
 templates/temp-clone-folder
 build/
+package-lock.json

src/templates/processor.ts

@@ -53,6 +53,9 @@ export class TemplateProcessor {
     processed = processed.replace(/\{\{PROJECT_PATH\}\}/g, context.projectPath || '.');
     processed = processed.replace(/\{\{CONTRACT_NAME\}\}/g, context.contractName || 'hello-world');
     processed = processed.replace(/\{\{LANGUAGE\}\}/g, context.language);
+    // Add LANGUAGE_EXT variable for file extensions (typescript -> ts, javascript -> js)
+    const languageExtension = context.language === 'typescript' ? 'ts' : 'js';
+    processed = processed.replace(/\{\{LANGUAGE_EXT\}\}/g, languageExtension);
     processed = processed.replace(/\{\{PACKAGE_MANAGER\}\}/g, context.packageManager);
 
     return processed;

templates/v4/base-template/README.md.template

@@ -13,9 +13,9 @@ This project uses the CKB JavaScript VM (ckb-js-vm) to write smart contracts in
 ├── contracts/           # Smart contract source code
 │   └── hello-world/
 │       └── src/
-│           └── index.{{LANGUAGE}} # Contract implementation
+│           └── index.{{LANGUAGE_EXT}} # Contract implementation
 ├── tests/              # Contract tests
-│   └── hello-world.test.{{LANGUAGE}}
+│   └── hello-world.test.{{LANGUAGE_EXT}}
 ├── scripts/            # Build and utility scripts
 │   ├── build-all.js
 │   ├── build-contract.js
@@ -93,7 +93,7 @@ This will:
 
 ### Contract Development
 
-1. Edit your contract in `contracts/<contract-name>/src/index.{{LANGUAGE}}`
+1. Edit your contract in `contracts/<contract-name>/src/index.{{LANGUAGE_EXT}}`
 2. Build the contract: `{{PACKAGE_MANAGER}} run build:contract <contract-name>`
 3. Run tests: `{{PACKAGE_MANAGER}} test -- <contract-name>`