feat(cli): Add emitcheck command to validate TS file emission without generating output

readme.md

@@ -121,6 +121,31 @@ compiling in this order:
 [ 'ts_interfaces', 'ts_shared', 'ts_core', 'ts_utils', 'ts_modules' ]
 ```
 
+### EmitCheck Command
+
+Checks if TypeScript files can be emitted without actually emitting them:
+
+```bash
+npx tsbuild emitcheck <file_or_glob_pattern> [additional_patterns ...]
+```
+
+This command:
+1. Performs type checking on the specified TypeScript file(s)
+2. Supports both direct file paths and glob patterns
+3. Reports any errors that would prevent successful compilation
+4. Exits with code 0 if all files can be emitted, or 1 if any cannot
+5. Doesn't produce any output files
+
+Example usage with specific files:
+```bash
+npx tsbuild emitcheck src/main.ts src/utils.ts
+```
+
+Example usage with glob patterns:
+```bash
+npx tsbuild emitcheck "src/**/*.ts" "test/**/*.ts"
+```
+
 ## Compiler Options
 
 Additional flags can be passed to any command to modify the compilation behavior: