[BUG] Java/js file fails to index in artifacts

[SamvelSimonyan]

Steps to reproduce:

1. Add a Java / js file to the artifacts.
2. Attempt to index the added Java /js file.

Actual results:

• The file is not indexed, and the system reports "0 files found."

https://dev.elitea.ai/alita_ui/18/toolkits/all/215?viewMode=owner&name=java

Expected results:

• The Java file should be successfully indexed, and the system should confirm the file's presence in the index.

[andrewfroze]

ProjectAlita/alita-sdk#277
added text loader for code extensions:
'.js', # JavaScript
'.ts', # TypeScript
'.java', # Java
'.cpp', # C++
'.c', # C
'.cs', # C#
'.rb', # Ruby
'.go', # Go
'.php', # PHP
'.swift', # Swift
'.kt', # Kotlin
'.rs', # Rust
'.m', # Objective-C
'.scala', # Scala
'.pl', # Perl
'.sh', # Shell
'.bat', # Batch
'.lua', # Lua
'.r', # R
'.pas', # Pascal
'.asm', # Assembly
'.dart', # Dart
'.groovy', # Groovy
'.sql', # SQL

[SamvelSimonyan]

verified on dev

[SamvelSimonyan]

verified on stage