feat: add support to accept Dataframe as input to split text, and added relevant tests (#6302)

* update to support dataframe

* [autofix.ci] apply automated fixes

* [autofix.ci] apply automated fixes (attempt 2/3)

* Update split_text.py

* [autofix.ci] apply automated fixes

* [autofix.ci] apply automated fixes

* update names

* Update src/backend/base/langflow/schema/dataframe.py

Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>

* [autofix.ci] apply automated fixes

* update to template

* update review changes

* Update Vector Store RAG.json

* fix lint errors

* fix tests

* 📝 (freeze.spec.ts): update test description to match the actual element being tested for better clarity and accuracy

* ✨ (stop-button-playground.spec.ts): improve test reliability by specifying target position for drag action to prevent flakiness

* ✅ (logs.spec.ts): increase timeout from 1000ms to 3000ms for better test reliability
✅ (stop-building.spec.ts): update test selector from "handle-splittext-shownode-data inputs-left" to "handle-splittext-shownode-input documents-left" for accurate testing
✅ (starter-projects.spec.ts): add a 1000ms timeout before asserting visibility of an element for better test stability

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>
Co-authored-by: cristhianzl <cristhian.lousa@gmail.com>

src/frontend/package-lock.json

@@ -836,6 +836,7 @@
     },
     "node_modules/@clack/prompts/node_modules/is-unicode-supported": {
       "version": "1.3.0",
+      "extraneous": true,
       "inBundle": true,
       "license": "MIT",
       "engines": {