Python: Add Agent Framework Lab Lightning package with RL training examples (#937)

* add math agent

* .

* update

* update debug mode

* add tau2 training

* .

* .

* .

* .

* add tests

* .

* revert observability

* update readme

* fix task serialization issue

* fix exception

* add inline docs

* update readme

* update pyproject toml

* minor fix

* update and use git lfs

* update

* update ignore file to use lab specific

* fix type

* update depedency

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Co-authored-by: Eric Zhu <ekzhu@users.noreply.github.com>

python/packages/lab/.gitignore

@@ -1 +1,13 @@
-test-results.xml
+test-results.xml
+
+# GAIA data directories
+data_gaia_hub/
+**/data_gaia_hub/
+gaia/**/*.jsonl
+
+# Lightning data directories
+lightning/**/data/tau2
+
+# TAU2 data directories
+tau2/**/data/
+tau2/**/results/