document tabular data commands search/prefix and add commands md table to docs (#101 & #110)

Author: RandomFractals

README.md

@@ -117,11 +117,27 @@ Hit Reload ↺ button in an open Table View 🀄 after you toggle Tabular Data S
 
 # Commands
 
-Tabular Data Viewer 中 provides a number of global and context specific commands to load and view tabular data files and [Data Packages](https://specs.frictionlessdata.io/data-package/#introduction) 📦:
+Tabular Data Viewer 中 provides a number of global and context specific commands to load and view tabular data files and [Data Packages](https://specs.frictionlessdata.io/data-package/#introduction) 📦.
+
+You can access custom Tabular Data Commands from `View -> Command Palette...` menu (`ctrl+shift+p`) by typing `Tabular` in command the search box:
 
 ![Tabular Data 中 Commands](https://github.com/RandomFractals/tabular-data-viewer/blob/main/docs/images/tabular-data-commands.png?raw=true 
  "Tabular Data 中 Commands")
 
+All Tabular Data Commands start with `Tabular Data:` prefix and custom command Ids use `tabular.data.` prefix. Some of the Tabular Data Commands like `View Table` and `List Data Resources` are enabled in vscode file explorer and in code editors for the supported data file types and formats via the corresponding context menues in vscode IDE.
+
+Currently supported Tabular Data 中 Commands include:
+
+| Command `tabular.data.` | Name | Description |
+| --- | --- | --- |
+| `listDataPackages` | List Data Packages | |
+| `listDataResources` | List Data Resources | |
+| `openDataFile` | Open Data File | |
+| `openTextDocument` | Open Text Document | |
+| `viewTable` | View Table | |
+| `viewDataFileOnGitHub` | View Data File on GitHub | |
+| `viewSettings` | View Settings | View Tabular Data Viewer 中 Configuration Settings |
+
 # Observable JS Notebook
 
 You can try [Tabular Data Viewer 🀄 Observable Notebook 📓](https://observablehq.com/@randomfractals/tabular-data-viewer) with public datasets and supported data formats in a browser: