GA: Try to check Tcl version

.github/workflows/check-tcl.yml

@@ -0,0 +1,65 @@
+on:
+  push:
+
+  pull_request:
+
+  workflow_dispatch:
+
+  schedule:
+    ## Run every 12 hours
+    - cron:  '0 */12 * * *'
+
+
+name: "Tcl checks"
+
+jobs:
+  check:
+    if: "! contains(github.event.head_commit.message, '[ci skip]')"
+
+    timeout-minutes: 10
+
+    runs-on: ubuntu-latest
+
+    name: Node ${{ matrix.config.node }} [${{ matrix.config.language }}]
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        config:
+          - { }
+          - { language: 'C'          }
+          - { language: 'en_US.utf8' }
+          - { language: 'et_EE.utf8' }
+
+    env:
+      LANGUAGE: ${{ matrix.config.language }}
+      LC_COLLATE: ${{ matrix.config.language }}
+
+    steps:
+    - name: Assert LANGUAGE availabilities
+      if: runner.os == 'Linux'
+      run: |
+        sudo locale-gen et_EE.utf8
+        locale -a | grep "${LANGUAGE}" || { >&2 echo "ERROR: LANGUAGE=${LANGUAGE} not installed"; exit 1; }
+        
+    - uses: actions/checkout@v4
+
+    - name: Install Tcl
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt-get install -y tclsh
+        
+    - name: Session information
+      run: |
+        tclsh <<< 'puts $tcl_version'
+        tclsh <<< 'puts $tcl_patchLevel'
+        echo "LANGUAGE: ${LANGUAGE:-<not set>}"
+        echo "LC_COLLATE: ${LC_COLLATE:-<not set>}"
+
+    - name: Check CLI
+      if: runner.os != 'Windows'
+      run: make check-cli/seguid-tcl
+
+    - name: Check API
+      run: make check-api/seguid-tcl