Add .gitattributes and sync script for GitHub + HF

.gitattributes

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+* text=auto
+*.sh text eol=lf
+setup.sh text eol=lf

sync.ps1

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+# sync.ps1 - Push local changes to BOTH GitHub and the HuggingFace Space.
+#
+# Usage:
+#   .\sync.ps1 "commit message"        # commit + push to GitHub + upload to HF
+#   .\sync.ps1                         # push + upload only (no new commit)
+#   .\sync.ps1 -DeployHfOnly           # upload to HF only (skip GitHub)
+#
+# Requirements:
+#   - Git installed, authenticated for GitHub (git push)
+#   - HF CLI (venv\Scripts\hf.exe) authenticated (hf auth login)
+
+param(
+    [string]$Message = "",
+    [switch]$DeployHfOnly
+)
+
+$ErrorActionPreference = "Stop"
+$root = $PSScriptRoot
+$hfCli = Join-Path $root "venv\Scripts\hf.exe"
+$space = "aryaa-05/llm-hallucination"
+
+Write-Host "=== Sync: $root ===" -ForegroundColor Cyan
+
+# 0) Fresh venv hf CLI?
+if (-not (Test-Path $hfCli)) {
+    Write-Warning "HF CLI not found at $hfCli"
+    $hfCli = "hf"
+}
+
+# 1) Optionally commit
+if ($Message) {
+    git -C $root add -A
+    if (-not $Message) { $Message = "Update" }
+    git -C $root commit -m $Message
+}
+
+# 2) Push to GitHub (skip if not configured / DeployHfOnly)
+if (-not $DeployHfOnly) {
+    $ghRemote = git -C $root remote
+    if ($ghRemote -match "origin") {
+        Write-Host "Pushing to GitHub (origin/main)..." -ForegroundColor Cyan
+        git -C $root push origin main
+    } else {
+        Write-Warning "No 'origin' remote configured; skipping GitHub push. Add one with: git remote add origin <url>"
+    }
+} else {
+    Write-Host "Skipping GitHub push (DeployHfOnly)." -ForegroundColor Yellow
+}
+
+# 3) Upload to HF Space (file-level upload, triggers rebuild)
+Write-Host "Uploading to HF Space $space ..." -ForegroundColor Cyan
+& $hfCli upload $space $root "." --repo-type space `
+    --exclude ".git/*" `
+    --exclude "venv/*" `
+    --exclude "__pycache__/*" `
+    --exclude "*.pyc" `
+    --exclude "*.log" `
+    --exclude ".env" `
+    --exclude ".env.*" `
+    --commit-message "sync: $Message from local"
+
+if ($LASTEXITCODE -ne 0) {
+    Write-Error "HF upload failed"
+}
+Write-Host "Done. HF Space will rebuild." -ForegroundColor Green