fix(qa): SEO API Bridge fixes, transport type corrections, README improvements

- Fix SEO API Bridge branding, meta keys, route namespaces, GET auth
- Create WordPress.org-compatible readme.txt
- Fix transport types across all docs (streamableHttp/http, not sse)
- Add WordPress Plugin Requirements section to README

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/getting-started.md

@@ -70,7 +70,7 @@ cd mcphub
 pip install -e .
 cp env.example .env
 # Edit .env with your site credentials
-python server.py --transport sse --port 8000
+python server.py --transport streamable-http --port 8000
 ```
 
 ### Option 4: Automated Setup Scripts
@@ -305,7 +305,7 @@ DIRECTUS_SITE1_ALIAS=my-directus                   # Recommended
 ### SSE Transport (for remote AI clients)
 
 ```bash
-python server.py --transport sse --port 8000
+python server.py --transport streamable-http --port 8000
 ```
 
 ### Stdio Transport (for Claude Desktop local)