Add Yarn package manager and dependencies

- Created package.json to include @google/gemini-cli as a dependency.
- Added shell script (yarn) for Unix-like systems to execute Yarn commands.
- Added Windows batch script (yarn.cmd) for executing Yarn commands on Windows.
- Added PowerShell script (yarn.ps1) for executing Yarn commands in PowerShell.
- Created yarnpkg scripts for Yarn package manager compatibility.

Author: sanchit122006

doc/source/user_guide/io.rst

@@ -193,6 +193,9 @@ skiprows : list-like or integer, default ``None``
 
   .. ipython:: python
 
+     import pandas as pd
+     from io import StringIO
+
      data = "col1,col2,col3\na,b,1\na,b,2\nc,d,3"
      pd.read_csv(StringIO(data))
      pd.read_csv(StringIO(data), skiprows=lambda x: x % 2 != 0)
@@ -2761,7 +2764,8 @@ Read an XML string:
 .. ipython:: python
 
     from io import StringIO
-   xml = """<?xml version="1.0" encoding="UTF-8"?>
+
+    xml = """<?xml version="1.0" encoding="UTF-8"?>
    <bookstore>
      <book category="cooking">
        <title lang="en">Everyday Italian</title>

npm/gemini

@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/node_modules/@google/gemini-cli/dist/index.js" "$@"
+else 
+  exec node  "$basedir/node_modules/@google/gemini-cli/dist/index.js" "$@"
+fi

npm/gemini.cmd

@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\node_modules\@google\gemini-cli\dist\index.js" %*

npm/gemini.ps1

@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/node_modules/@google/gemini-cli/dist/index.js" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/node_modules/@google/gemini-cli/dist/index.js" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/node_modules/@google/gemini-cli/dist/index.js" $args
+  } else {
+    & "node$exe"  "$basedir/node_modules/@google/gemini-cli/dist/index.js" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret