feat: Add Global Data Block recognition in workspace scope

- Add db_parser.lua to parse .db files (DATA_BLOCK with VAR sections)
- Update workspace_types.lua to scan for .db files in project
- Update blink_cmp_source.lua to provide DB auto-completion:
  - DB names available in general completion (without quotes)
  - Type quote to get DB members
  - Multi-level nested member access support
- Add DB count to workspace commands
- Update README with Global DB documentation

README.md

@@ -45,7 +45,8 @@ A comprehensive Neovim/LazyVim plugin providing **Language Server Protocol (LSP)
 | **Auto-Prefix** | Automatically adds `#` prefix to local variables (like TIA Portal) |
 | **Multiline Parameters** | Fill FB/Function call parameters across multiple lines with `<Space>mp` or `:SCLMultilineParams` |
 | **Tab Navigation** | Jump between parameters with `<Tab>` in insert mode |
-| **Workspace UDT Scanner** | Scans project for user-defined types |
+| **Workspace UDT Scanner** | Scans project for user-defined types (.udt files) |
+| **Workspace Global DB Scanner** | Scans project for global data blocks (.db files) |
 | **blink.cmp Integration** | Smart completion source for blink.cmp |
 
 ## Installation
@@ -109,8 +110,8 @@ require("scl_lsp").setup({
 | Command | Description |
 |---------|-------------|
 | `:SCLShowVariables` | Show local variables in current file |
-| `:SCLShowWorkspaceTypes` | Show workspace UDTs and FB count |
-| `:SCLRescanWorkspaceTypes` | Rescan workspace for types |
+| `:SCLShowWorkspaceTypes` | Show workspace UDTs, FBs, and Global DBs count |
+| `:SCLRescanWorkspaceTypes` | Rescan workspace for types and DBs |
 | `:SCLPrefixWord` | Manually prefix current word with `#` |
 | `:SCLMultilineParams` | Fill multiline parameters for FB/Function call |
 | `:LspSCLFormat` | Format current SCL file |
@@ -155,7 +156,34 @@ The LSP automatically scans for SCL files in `data_types/` folder and extracts T
 lua /home/lazar/dev/scl_lsp/src/plc_json.lua --generate
 ```
 
-## Project Structure
+## Global Data Block Support
+
+The plugin automatically scans for `.db` files in the workspace and provides auto-completion for global data blocks and their members.
+
+### How it works
+
+1. **Workspace Scanning**: When opening a `.scl` file, the plugin scans the project for `.db` files
+2. **DB Parsing**: Parses `DATA_BLOCK` definitions and extracts members from `VAR` sections
+3. **Auto-completion**: Provides smart completion for DB names and members
+
+### Usage
+
+- Type a space or `#` to trigger completion - global DB names appear alongside local variables
+- Type `"` followed by a DB name to get member completions
+- Access nested members: `"MyDB".member.submember`
+
+### Example
+
+```scl
+// Access global DB members
+"HmiData".units
+"Parameter".machine.unit100.paramTimeStampApplied
+
+// Inside FB call parameter
+#instParameterManager(hmiInterface:="HmiData".units, ...)
+```
+
+### Project Structure
 
 ```
 scl_lsp/
@@ -187,6 +215,7 @@ scl_lsp/
             ├── init.lua
             ├── auto_prefix.lua
             ├── blink_cmp_source.lua
+            ├── db_parser.lua
             ├── fb_parser.lua
             ├── udt_parser.lua
             ├── variables.lua