chore: loading resources to run locally (#74)

## Summary

- Load local resources irrespective of where the tests are currently
being run from. This allows us to run them from Intellij.
- 
## Checklist
- [x] Added Unit Tests
- [x] Covered by existing CI
- [x] Integration tested
- [x] Documentation update



<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **Bug Fixes**
- Improved test robustness by replacing hardcoded file paths with
dynamic resource URI retrieval for loading test data.
  
- **Tests**
- Enhanced flexibility in test cases for locating resources, ensuring
consistent access regardless of the working directory.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: tchow-zlai

spark/src/test/scala/ai/chronon/spark/test/LocalDataLoaderTest.scala

@@ -47,7 +47,9 @@ class LocalDataLoaderTest {
 
   @Test
   def loadDataFileAsTableShouldBeCorrect(): Unit = {
-    val file = new File("spark/src/test/resources/local_data_csv/test_table_1_data.csv")
+    val resourceURL = Option(getClass.getResource("/local_data_csv/test_table_1_data.csv"))
+      .getOrElse(throw new IllegalStateException("Required test resource not found"))
+    val file = new File(resourceURL.getFile)
     val nameSpaceAndTable = "test.table"
     LocalDataLoader.loadDataFileAsTable(file, spark, nameSpaceAndTable)
 
@@ -60,7 +62,8 @@ class LocalDataLoaderTest {
 
   @Test
   def loadDataRecursivelyShouldBeCorrect(): Unit = {
-    val path = new File("spark/src/test/resources/local_data_csv")
+    val resourceURI = getClass.getResource("/local_data_csv")
+    val path = new File(resourceURI.getFile)
     LocalDataLoader.loadDataRecursively(path, spark)
 
     val loadedDataDf = spark.sql("SELECT * FROM local_data_csv.test_table_1_data")