feat: add short option flags for common options

Added short flags for better CLI experience:
- -s, --syntax (already existed)
- -f, --filter (already existed)
- -c, --config (new)
- -i, --indent (new)
- -t, --tab-stops (new)
- -n, --no-tab-stops (new)

Examples:
  emmet expand 'div.container>p' -s html -n
  emmet expand 'ul>li*2' -s html -i '  ' -n
  emmet expand 'div#app>header' -s html -f c -n

Updated README with short option documentation and examples.

Author: saifulapm

README.md

@@ -65,10 +65,10 @@ Expand Emmet abbreviation to code.
 **Options:**
 - `-s, --syntax <lang>` - Language/syntax (html, css, jsx, etc.)
 - `-f, --filter <filters>` - Filters: bem, c, t (comma-separated)
-- `--config <path>` - Custom config directory
-- `--indent <chars>` - Indentation string (default: tab)
-- `--tab-stops` - Include tab stops (default: true)
-- `--no-tab-stops` - Disable tab stops
+- `-c, --config <path>` - Custom config directory
+- `-i, --indent <chars>` - Indentation string (default: tab)
+- `-t, --tab-stops` - Include tab stops (default: true)
+- `-n, --no-tab-stops` - Disable tab stops
 - `--var-<name>=<value>` - Set template variables
 
 **Examples:**
@@ -95,9 +95,14 @@ emmet expand "button[onClick={handleClick}]" --syntax jsx
 
 # Custom indentation (2 spaces)
 emmet expand "ul>li*2" --syntax html --indent "  " --no-tab-stops
+# Or using short options:
+emmet expand "ul>li*2" -s html -i "  " -n
 
 # Set template variables
 emmet expand "!" --syntax html --var-lang=en --var-charset=UTF-8
+
+# Using short options for quick commands
+emmet expand "div#app>header.header" -s html -f c -n
 ```
 
 ### `emmet wrap <abbreviation>`

src/index.ts

@@ -20,10 +20,10 @@ program
 program
   .option('-s, --syntax <lang>', 'Language/syntax (html, css, jsx, etc.)')
   .option('-f, --filter <filters>', 'Filters: bem, c, t (comma-separated)')
-  .option('--config <path>', 'Custom config directory')
-  .option('--indent <chars>', 'Indentation string (default: tab)', '\t')
-  .option('--tab-stops', 'Include tab stops (default: true)', true)
-  .option('--no-tab-stops', 'Disable tab stops')
+  .option('-c, --config <path>', 'Custom config directory')
+  .option('-i, --indent <chars>', 'Indentation string (default: tab)', '\t')
+  .option('-t, --tab-stops', 'Include tab stops (default: true)', true)
+  .option('-n, --no-tab-stops', 'Disable tab stops')
   .allowUnknownOption(); // Allow --var-* options
 
 // Expand command