fix(hql): Correct diagnostic file content rendering and add filepath to schema parsing methods

[ishaksebsib]

Description

Problem

Diagnostics displayed incorrect line content because the diagnostic renderer used combined source content instead of the specific file content where the error occurred.

Before (incorrect):

error[E204]: field `Label` is a reserved field name
   ┌─ /home/pro/test/helix/second/queries.hx:3:6
   │
 3 │      RETURN friends  ← Wrong content from query.hx file instead of the schema.hx 
   │     ^^^^^^^^^^^^^

Solution

• Added filepath parameter to schema parsing methods (parse_field_def, parse_node_body, parse_properties)

• Updated diagnostic rendering in helix-cli/src/utils.rs to find the correct file content by matching the diagnostic's filepath:

// Find the correct file content for this diagnostic
let file_content = content.files.iter()
    .find(|f| f.name == filepath)
    .map(|f| &f.content)
    .unwrap_or(&analyzed_source.src);

After (correct):

error[E204]: field `Label` is a reserved field name
   ┌─ /home/pro/test/helix/second/schema.hx:3:6
   │
 3 │     Label: String,  ← Correct content from schema file
   │     ^^^^^^^^^^^^^

summary

• Added filepath parameter to schema parsing methods (parse_field_def, parse_node_body, parse_properties)
• Updated location creation to use loc_with_filepath(filepath) instead of loc()
• Fixed diagnostic rendering to use individual file content matching the diagnostic's filepath
• Updated CLI integration to pass Content structure for proper file access

Related Issues

None

Checklist when merging to main

• No compiler warnings (if applicable)
• Code is formatted with rustfmt
• No useless or dead code (if applicable)
• Code is easy to understand
• Doc comments are used for all functions, enums, structs, and fields (where appropriate)
• All tests pass
• Performance has not regressed (assuming change was not to fix a bug)
• Version number has been updated in helix-cli/Cargo.toml and helixdb/Cargo.toml

Additional Notes

None