Add meta merging in docs (#440)

.github/workflows/link_check.yml

@@ -50,4 +50,4 @@ jobs:
         env:
           LANGCHAIN_API_KEY: test
           shell: bash
-        run: poetry run pytest -o python_files=non_python_only --check-links --ignore="*.py" -k .ipynb --check-links-ignore "https://(api|web)\.smith\.langchain\.com/.*" --check-links-ignore "https://x.com/.*" ./examples
+        run: poetry run pytest -o python_files=non_python_only --check-links --ignore="*.py" -k .ipynb --check-links-ignore "https://(api|web)\.smith\.langchain\.com/.*" --check-links-ignore "https://x.com/.*" --check-links-ignore "*.dcbadge.vercel.app*"./examples

docs/docs/concepts/.meta.yml

@@ -0,0 +1,4 @@
+tags:
+  - concepts
+  - conceptual guide
+  - explanation

docs/docs/how-tos/.meta.yml

@@ -0,0 +1,5 @@
+tags:
+  - how-tos
+  - how-to
+  - howto
+  - how to

docs/docs/reference/.meta.yml

@@ -0,0 +1,4 @@
+tags:
+  - reference
+  - api
+  - api-reference

docs/docs/tutorials/.meta.yml

@@ -0,0 +1,2 @@
+tags:
+  - tutorials

docs/mkdocs.yml

@@ -51,6 +51,7 @@ plugins:
   - search:
       separator: '[\s\u200b\-_,:!=\[\]()"`/]+|\.(?!\d)|&[lg]t;|(?!\b)(?=[A-Z][a-z])'
   - autorefs
+  - meta
   - mkdocstrings:
       handlers:
         python: