fix: Draw terminal characters individually to prevent clipping with fractional DPI scaling

On Windows with fractional DPI scaling (125%, 150%), SWT/GDI accumulates sub-pixel rounding when drawing a whole string, causing glyphs to overflow their grid cells. Draw
each character at its exact cell position instead.

Author: astrograph

terminal/bundles/org.eclipse.terminal.control/src/org/eclipse/terminal/internal/textcanvas/TextLineRenderer.java

@@ -169,8 +169,19 @@ private void drawText(GC gc, int x, int y, int colFirst, int col, String text) {
 				}
 			}
 		} else {
-			text = text.replace('\000', ' ');
-			gc.drawString(text, x + offset, y, false);
+			// Draw each character individually aligned to its grid cell.
+			// Drawing a full string at once causes accumulated sub-pixel rounding
+			// on Windows with fractional DPI scaling (e.g. 125%, 150%), making
+			// characters appear wider than their grid cell and clipping the
+			// rightmost 1-2 pixel columns of each glyph.
+			int cellWidth = getCellWidth();
+			for (int i = 0; i < text.length(); i++) {
+				char c = text.charAt(i);
+				if (c == '\000') {
+					c = ' ';
+				}
+				gc.drawString(String.valueOf(c), x + offset + i * cellWidth, y, false);
+			}
 		}
 	}