Fix indentation offset when using Eglot with LSP indentation.

This fix correctly sets `tab-width`, which Eglot uses to specify the
indentation offset to the Language Server.  `tab-width` needs to be
set to `ada-ts-mode-indent-offset` before calling `eglot-format`.  It
was incorrectly using the default value of `tab-width` instead.

ada-ts-mode-lspclient-eglot.el

@@ -58,10 +58,7 @@
 
 (cl-defmethod ada-ts-mode-lspclient-format-region ((_client (eql eglot)) beg end)
   "Format region BEG to END of using Language Server."
-  (let ((tab-width ; eglot uses `tab-width' to specify indentation
-         (cond ((local-variable-p 'standard-indent) standard-indent)
-               (t tab-width))))
-    (eglot-format beg end)))
+  (eglot-format beg end))
 
 (cl-defmethod ada-ts-mode-lspclient-workspace-configuration ((_client (eql eglot)) scope)
   "Retrieve workspace configuration for SCOPE."

ada-ts-mode.el

@@ -4,7 +4,7 @@
 
 ;; Author: Troy Brown <[email protected]>
 ;; Created: February 2023
-;; Version: 0.7.0
+;; Version: 0.7.1
 ;; Keywords: ada languages tree-sitter
 ;; URL: https://github.com/brownts/ada-ts-mode
 ;; Package-Requires: ((emacs "29.1"))
@@ -690,6 +690,7 @@ formatting function fails."
 When CLIENT is not nil, use it as the active LSP client."
   (if-let* ((client (or client (ada-ts-mode-lspclient-current))))
       (let ((inhibit-message t)
+            (tab-width ada-ts-mode-indent-offset)
             (standard-indent ada-ts-mode-indent-offset))
         (ada-ts-mode-lspclient-format-region client beg end))
     ;; fallback on default indentation