Refactoring: Improve class naming and consolidate text coordinate representations

* Rename TextCoordinates -> TextCoordinateProvider
* Consolidate ls_util.LineCol, text_utils.TextCoords -> ls_util.TextCoordinates

scripts/profile_search_text.py

@@ -22,7 +22,7 @@ import sys
 import time
 
 import solidlsp  # noqa: F401  # imported first: solidlsp must resolve before serena.util.text_utils (known circular-import window)
-from solidlsp.ls_utils import TextCoordinates, TextUtils
+from solidlsp.ls_utils import TextCoordinateProvider, TextUtils
 
 
 def generate_synthetic_content(num_lines: int, match_identifier: str, match_frequency: float = 0.15) -> str:
@@ -67,12 +67,12 @@ def resolve_before(content: str, compiled_pattern: re.Pattern) -> list[tuple[int
 
 def resolve_after(content: str, compiled_pattern: re.Pattern) -> list[tuple[int, int]]:
     """Resolves line coordinates the way this PR proposes (cached line starts + binary search)."""
-    coordinates = TextCoordinates(content)
+    coordinates = TextCoordinateProvider(content)
     results = []
     for match in compiled_pattern.finditer(content):
         start_pos, end_pos = match.start(), match.end()
-        s = coordinates.line_col_at_index(start_pos).line
-        end_loc = coordinates.line_col_at_index(end_pos)
+        s = coordinates.compute_coordinates(start_pos).line
+        end_loc = coordinates.compute_coordinates(end_pos)
         e = end_loc.line
         if e > s and end_loc.col == 0:
             e -= 1