build: streamline package discovery and bump to v0.4.243

- Replace explicit package listing with setuptools.find
- Include all crawl4ai.* packages automatically
- Use `packages = {find = {where = ["."], include = ["crawl4ai*"]}}` syntax
- Bump version to 0.4.243

This change simplifies package maintenance by automatically discovering
all subpackages under crawl4ai namespace instead of listing them manually.

pyproject.toml

@@ -69,10 +69,10 @@ crawl4ai-doctor = "crawl4ai.install:doctor"
 crawl = "crawl4ai.cli:cli"
 
 [tool.setuptools]
-packages = ["crawl4ai", "crawl4ai.js_snippet"]
+packages = {find = {where = ["."], include = ["crawl4ai*"]}}
 
 [tool.setuptools.package-data]
 crawl4ai = ["js_snippet/*.js"]
 
 [tool.setuptools.dynamic]
-version = {attr = "crawl4ai.__version__.__version__"}
+version = {attr = "crawl4ai.__version__.__version__"}