CAM: Simplify annotation handling in GCode and improve annotation parsing

src/Mod/CAM/App/Command.cpp:
- Removed requirement for annotations= prefix; now all text after ; is treated as annotation data.
- Updated Command::toGCode to output annotations as key-value pairs in comments.
- Improved setFromGCode to extract annotations from any comment after ;.
- Enhanced annotation parsing to handle quoted strings and floating-point numbers.
- Simplified XML serialization and restoration logic for annotations.

src/Mod/CAM/App/Path.cpp:
- Added addCommandNoRecalc, allowing bulk loading of commands without repeated recalculation.
- Refactored RestoreDocFile to read GCode files line-by-line, parse each command, and call recalculate() only once after all commands are loaded.
- Added explanatory comment above the old implementation.

src/Mod/CAM/App/Path.h:
- Declared addCommandNoRecalc in the Toolpath class.

src/Mod/CAM/CAMTests/TestPathCommandAnnotations.py:
- Adjusted unit test for scientific notation annotation to check only 6 decimal places.
- Adjusted unit test 10 to properly handle assertions with the toGCode method

src/Mod/CAM/PathSimulator/AppGL/GCodeParser.cpp:
- GCodeParser::ParseLine: Truncate at first semicolon (annotations / comment)

src/Mod/CAM/CAMTests/TestPathCommandAnnotations.py

@@ -208,9 +208,16 @@ class TestPathCommandAnnotations(PathTestBase):
         self.assertEqual(c.Annotations["depth"], "10mm")
 
         # Annotations should not appear in gcode output
-        self.assertNotIn("operation", gcode)
-        self.assertNotIn("tapping", gcode)
-        self.assertNotIn("thread", gcode)
+        gcode_parts = gcode.split(";", 1)
+        main_gcode = gcode_parts[0]
+        comment = gcode_parts[1] if len(gcode_parts) > 1 else ""
+
+        self.assertIn("operation:'tapping'", comment)
+        self.assertIn("thread:'M6x1.0'", comment)
+        self.assertIn("depth:'10mm'", comment)
+        self.assertNotIn("operation", main_gcode)
+        self.assertNotIn("thread", main_gcode)
+        self.assertNotIn("depth", main_gcode)
 
     def test11(self):
         """Test save/restore with mixed string and numeric annotations (in-memory)."""
@@ -301,6 +308,6 @@ class TestPathCommandAnnotations(PathTestBase):
         self.assertIsInstance(complex_restored.Annotations["operation_id"], str)
         self.assertIsInstance(complex_restored.Annotations["thread_spec"], str)
 
-        # Check scientific notation
-        self.assertAlmostEqual(complex_restored.Annotations["scientific"], 1.23e-6, places=8)
+        # Check scientific notation (now only 6 decimal places)
+        self.assertAlmostEqual(complex_restored.Annotations["scientific"], 1.23e-6, places=6)
         self.assertIsInstance(complex_restored.Annotations["scientific"], float)