feat(lsp): add Tcl command-aware completion and integration

- Introduced a Tcl command-aware completion engine and wired to LSP.
- Added a new module with Tcl commands, options, and contextual matching.
- Updated completion to favor command-aware items and args.

README.md

@@ -12,7 +12,7 @@ A comprehensive VS Code extension providing language support and remote debuggin
 - **Signature Help** - Shows parameters and documentation for custom and NX procedures
 - **Call Hierarchy** - Traces incoming and outgoing calls between custom TCL procedures and MOM event handlers
 - **Document Highlights** - Highlights all reads, writes, and calls of the symbol under the cursor
-- **Context-aware Completion** - Prioritizes local symbols and suggests variables or commands based on cursor context
+- **Context-aware Completion** - Prioritizes local symbols and suggests variables, commands, Tcl subcommands, and valid options based on cursor context
 - **NX Tcl Remote Debugger** - Breakpoints, stepping, call stack, scopes, variables, watches, evaluation, logpoints, hit conditions, and Tcl error stops directly in a running NX Post process
 
 ## Supported File Types
@@ -101,7 +101,7 @@ Simply open any supported file type and enjoy:
 - Signature help while entering procedure arguments
 - Incoming and outgoing call hierarchy for custom procedures and MOM event handlers
 - Document-wide highlights for procedure and variable occurrences
-- Context-aware completion with local symbols ranked before workspace and built-in symbols
+- Context-aware completion with local symbols ranked before workspace and built-in symbols, plus Tcl subcommands and options such as `string compare -nocase`
 - Remote NX Tcl debugging with breakpoints and full stepping
 
 ## Contributing