add yaml file to build success for readthedoc (#1740)

2.x/.readthedocs.yaml

@@ -0,0 +1,29 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.7"
+    # nodejs: "20"
+    # rust: "1.70"
+    # golang: "1.20"
+
+sphinx:
+  configuration: 2.x/conf.py
+
+# Optionally build your docs in additional formats such as PDF and ePub
+formats:
+   - pdf
+   - epub
+
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
+python:
+   install:
+   - requirements: ./requirements.txt

2.x/en/.readthedocs.yaml

@@ -0,0 +1,29 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.7"
+    # nodejs: "20"
+    # rust: "1.70"
+    # golang: "1.20"
+
+sphinx:
+  configuration: 2.x/en/conf.py
+
+# Optionally build your docs in additional formats such as PDF and ePub
+formats:
+   - pdf
+   - epub
+
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
+python:
+   install:
+   - requirements: ./requirements.txt

3.x/zh_CN/.readthedocs.yaml

@@ -0,0 +1,30 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.7"
+    # nodejs: "20"
+    # rust: "1.70"
+    # golang: "1.20"
+
+sphinx:
+  configuration: 3.x/zh_CN/conf.py
+
+# Optionally build your docs in additional formats such as PDF and ePub
+# formats:
+#    - pdf
+#    - epub
+
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
+python:
+   install:
+   - requirements: ./requirements.txt
+