Release prep (#749)

* fix: Update export of URLPatternFilter

* chore: Add dependancy for cchardet in requirements

* docs: Update example for deep crawl in release note for v0.5

* Docs: update the example for memory dispatcher

* docs: updated example for crawl strategies

* Refactor: Removed wrapping in if __name__==main block since this is a markdown file.

* chore: removed cchardet from dependancy list, since unclecode is planning to remove it

* docs: updated the example for proxy rotation to a working example

* feat: Introduced ProxyConfig param

* Add tutorial for deep crawl & update contributor list for bug fixes in feb alpha-1

* chore: update and test new dependancies

* feat:Make PyPDF2 a conditional dependancy

* updated tutorial and release note for v0.5

* docs: update docs for deep crawl, and fix a typo in docker-deployment markdown filename

* refactor: 1. Deprecate markdown_v2 2. Make markdown backward compatible to behave as a string when needed. 3. Fix LlmConfig usage in cli 4. Deprecate markdown_v2 in cli 5. Update AsyncWebCrawler for changes in CrawlResult

* fix: Bug in serialisation of markdown in acache_url

* Refactor: Added deprecation errors for fit_html and fit_markdown directly on markdown. Now access them via markdown

* fix: remove deprecated markdown_v2 from docker

* Refactor: remove deprecated fit_markdown and fit_html from result

* refactor: fix cache retrieval for markdown as a string

* chore: update all docs, examples and tests with deprecation announcements for markdown_v2, fit_html, fit_markdown

docs/md_v2/api/async-webcrawler.md

@@ -200,7 +200,7 @@ Each `arun()` returns a **`CrawlResult`** containing:
 - `url`: Final URL (if redirected).
 - `html`: Original HTML.
 - `cleaned_html`: Sanitized HTML.
-- `markdown_v2` (or future `markdown`): Markdown outputs (raw, fit, etc.).
+- `markdown_v2`: Deprecated. Instead just use regular `markdown`
 - `extracted_content`: If an extraction strategy was used (JSON for CSS/LLM strategies).
 - `screenshot`, `pdf`: If screenshots/PDF requested.
 - `media`, `links`: Information about discovered images/links.