fix: update translation workflow to include lesson README files and remove unnecessary branch

Author: pelikhan

.github/workflows/translation.yml

@@ -4,9 +4,9 @@ on:
   push:
     branches:
       - main
-      - pelikhan/translations
     paths:
       - "README.md"
+      - lessons/*/README.md
 permissions:
   contents: write
   models: read

translations/usage.jsonl

@@ -94,3 +94,11 @@
 {"filename":"lessons/03-prompt-engineering/README.md","lang":"fr","tokens":3627,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:07:51.909Z","cost":0,"duration":2.885588999997708,"total":0,"prompt":0,"completion":0}
 {"filename":"lessons/02-first-ai-app/README.md","lang":"fr","tokens":5634,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:07:52.312Z","cost":0,"duration":2.809857000000193,"total":0,"prompt":0,"completion":0}
 {"filename":"lessons/01-intro-to-genai/README.md","lang":"fr","tokens":4732,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:07:52.690Z","cost":0,"duration":3.010670999996364,"total":0,"prompt":0,"completion":0}
+{"filename":"lessons/08-mcp-advanced/README.md","lang":"fr","tokens":3104,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:08:47.493Z","cost":0,"duration":6.4269510000012815,"total":0,"prompt":0,"completion":0}
+{"filename":"lessons/07-mcp/README.md","lang":"fr","tokens":5431,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:08:48.062Z","cost":0,"duration":3.4443410000021686,"total":0,"prompt":0,"completion":0}
+{"filename":"lessons/06-tool-calling/README.md","lang":"fr","tokens":4730,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:08:48.410Z","cost":0,"duration":3.2079999999987194,"total":0,"prompt":0,"completion":0}
+{"filename":"lessons/05-rag/README.md","lang":"fr","tokens":4252,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:08:48.781Z","cost":0,"duration":4.944412999997439,"total":0,"prompt":0,"completion":0}
+{"filename":"lessons/04-structured-output/README.md","lang":"fr","tokens":6232,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:08:49.162Z","cost":0,"duration":2.8556919999973616,"total":0,"prompt":0,"completion":0}
+{"filename":"lessons/03-prompt-engineering/README.md","lang":"fr","tokens":3627,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:08:49.597Z","cost":0,"duration":3.1337019999991753,"total":0,"prompt":0,"completion":0}
+{"filename":"lessons/02-first-ai-app/README.md","lang":"fr","tokens":5634,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:08:50.018Z","cost":0,"duration":2.942544999998063,"total":0,"prompt":0,"completion":0}
+{"filename":"lessons/01-intro-to-genai/README.md","lang":"fr","tokens":4732,"stage":"validate","model":"github:openai/gpt-4o","date":"2025-07-12T13:08:50.420Z","cost":0,"duration":3.8818299999984447,"total":0,"prompt":0,"completion":0}