docs: add privacy policy and extension documentation

scripts/build_extension.py

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+import json
+import os
+import shutil
+import zipfile
+
+# Configuration
+SOURCE_DIR = "extension"
+BUILD_DIR = "dist-extension"
+OUTPUT_ZIP = "extension-release.zip"
+MANIFEST_FILE = "manifest.json"
+
+# Remove build directory if exists
+if os.path.exists(BUILD_DIR):
+    shutil.rmtree(BUILD_DIR)
+
+# Copy source directory to build directory
+shutil.copytree(SOURCE_DIR, BUILD_DIR)
+
+# Modify manifest.json for production
+manifest_path = os.path.join(BUILD_DIR, MANIFEST_FILE)
+with open(manifest_path, "r") as f:
+    manifest = json.load(f)
+
+# Filter permissions and content scripts (remove localhost)
+print("Removing localhost from manifest...")
+
+# Filter host_permissions
+if "host_permissions" in manifest:
+    manifest["host_permissions"] = [
+        perm for perm in manifest["host_permissions"] 
+        if "localhost" not in perm
+    ]
+
+# Filter content_scripts matches
+if "content_scripts" in manifest:
+    for script in manifest["content_scripts"]:
+        if "matches" in script:
+            script["matches"] = [
+                match for match in script["matches"] 
+                if "localhost" not in match
+            ]
+
+# Save modified manifest
+with open(manifest_path, "w") as f:
+    json.dump(manifest, f, indent=2)
+
+# Create ZIP file
+print(f"Creating {OUTPUT_ZIP}...")
+with zipfile.ZipFile(OUTPUT_ZIP, "w", zipfile.ZIP_DEFLATED) as zipf:
+    for root, dirs, files in os.walk(BUILD_DIR):
+        for file in files:
+            file_path = os.path.join(root, file)
+            arcname = os.path.relpath(file_path, BUILD_DIR)
+            zipf.write(file_path, arcname)
+
+# Cleanup
+shutil.rmtree(BUILD_DIR)
+print(f"Done! {OUTPUT_ZIP} is ready for upload to Chrome Web Store.")