feat(tools): recognize procedures stored in COMMANDBLOCK properties

Add a new module that parses PostConfigurator COMMANDBLOCK values (CONF_* set ...)
to extract the first word of braced list elements as procedure names with precise
line/column spans.

- server/src/tools/stored_procs.py: implement stored_command_names(command)
  which returns (name, line, column) for static/braced list elements.
- Integrate into navigation (build_file_symbol_index) to index these names as
  non-definitions so Go To Definition / Find References can resolve them.
- Integrate into semantic highlighting to mark known stored procedures as
  functions when appropriate.
- Add tests (server/tests/python_tests/test_stored_procs.py) covering parsing,
  goto-definition, references, and highlighting behavior.
- Update CHANGELOG to note the new capability.

Notes/constraints:
- Only static/braced COMMANDBLOCK values (BracedWord) are considered.
- Names must match the command-name pattern and are taken from the first word
  of each list element.

server/src/tools/semantic_tokens.py

@@ -5,6 +5,7 @@ import attrs
 from common.load_data import standard_items
 from tclint.commands.plugins import PluginManager
 from tclint.syntax_tree import BareWord, BracedWord, Command, QuotedWord, Visitor
+from tools.stored_procs import stored_command_names
 from tools.variable_names import variable_name
 from tools.tcloo_symbols import class_symbols
 from tools.tcloo_completion import _analyze
@@ -182,6 +183,11 @@ class _Highlighter(Visitor):
                     line, col = argument.contents_pos
                     self._append_token((line - 1, col - 1), len(argument.contents), "function", [])
 
+        # Procedures stored in COMMANDBLOCK properties (CONF_x set prop {proc}).
+        for stored_name, line, col in stored_command_names(command):
+            if stored_name in self._custom_function_names or stored_name in _STANDARD_PROC_NAMES:
+                self._append_token((line - 1, col - 1), len(stored_name), "function", [])
+
         # Highlight functions (custom or standard) when used as the routine
         name = getattr(routine, "contents", None)
         if name: