Reorganize problem matchers

Author: snejus

.github/problem-matchers/sphinx-build.json

@@ -0,0 +1,16 @@
+{
+  "problemMatcher": [
+    {
+      "owner": "sphinx-build",
+      "severity": "error",
+      "pattern": [
+        {
+          "regexp": "^(/[^:]+):((\\d+):)?(\\sWARNING:)?\\s(.+)$",
+          "file": 1,
+          "line": 3,
+          "message": 5
+        }
+      ]
+    }
+  ]
+}

.github/problem-matchers/sphinx-lint.json

@@ -0,0 +1,17 @@
+{
+  "problemMatcher": [
+    {
+      "owner": "sphinx-lint",
+      "severity": "error",
+      "pattern": [
+        {
+          "regexp": "^([^:]+):(\\d+):\\s+(.*)\\s\\(([a-z-]+)\\)$",
+          "file": 1,
+          "line": 2,
+          "message": 3,
+          "code": 4
+        }
+      ]
+    }
+  ]
+}

.github/sphinx-problem-matcher.json

@@ -131,8 +131,10 @@ jobs:
       - name: Install dependencies
         run: poetry install --extras=docs
 
-      - name: Add Sphinx problem matcher
-        run: echo "::add-matcher::.github/sphinx-problem-matcher.json"
+      - name: Add Sphinx problem matchers
+        run: |
+          echo "::add-matcher::.github/problem-matchers/sphinx-build.json"
+          echo "::add-matcher::.github/problem-matchers/sphinx-lint.json"
 
       - name: Build docs
         run: poe docs -e SPHINXOPTS=--fail-on-warning