Update Install (#1)

- Update readme with installation instructions.
- Update install.ps1 script with installation for each symlink file.

Co-authored-by: Eric D. Rohler <erohler@progress.com>
Reviewed-on: #1
Co-authored-by: Eric D. Rohler <edrohler@noreply@nodomain.org>
Co-committed-by: Eric D. Rohler <edrohler@noreply@nodomain.org>

vscode/settings.json

@@ -30,6 +30,7 @@
         "Configruation",
         "Crosstab",
         "Crosstabs",
+        "DOSKEY",
         "Datasource",
         "Etag",
         "GIFs",