Replace Mantine modal with Radix dialog

[kmcginnes]

Description

This continues the path toward the removal of Mantine and adoption of Radix. This PR replaces all usages of the Mantine component Modal with the Radix equivalent Dialog and AlertDialog.

The method of controlling the open and closed states of the Radix dialog's is a bit different than Mantine Modal and required some finessing. I've done extensive testing on the 8 different modals in the system.

There are also some new style changes I've added. The dialog header now has a consistent style across all dialogs, and some now show a new subtitle. The dialog footer now has a very faint gray background to make it visually distinct from the other elements in the dialog.

For the customize style dialogs I updated the style for the section headings and improved the padding. For the alerts used during the configuration data restore process I had to redesign them a bit to fit with the standard dialog header and footer.

There are before and after shots in the validation section below.

Validation

• Ensured dialog triggers behave properly
• Ensured dialogs scroll when view port is too small
• Ensured escape and click outside closes Dialog but not AlertDialog

Connection UI & Custom SPARQL Namespace

Not much different here. Just the new standard header and footer styles.

Before	After

Configuration Restore

This required the most redesign of all.

• Uses Dialog for the first dialog since it can be canceled and escaped easily
• Uses AlertDialog for the success and error screens since they are informational and only have a single option for the user to choose
• Uses icons from Lucide to reduce visual weight
• Adds a "well" design and an icon for the file name in the confirmation and error dialogs to make it more visually distinct

Before	After

Customize vertex or edge styles

• Adjusted spacing between sections
• Updated style of section header to give it more prominence
• Adjusted title & added subtitle

Before	After

Related Issues

• Resolves [Task] Migrate Modal to Radix & Tailwind #701

Check List

• I confirm that my contribution is made under the terms of the Apache 2.0
  license.
• I have run pnpm checks to ensure code compiles and meets standards.
• I have run pnpm test to check if all tests are passing.
• I have covered new added functionality with unit tests if necessary.
• I have added an entry in the Changelog.md.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1114 lines in your changes missing coverage. Please review.

Project coverage is 15.86%. Comparing base (9d3a2b7) to head (04cbc53).
Report is 46 commits behind head on main.

Files with missing lines	Patch %	Lines
...rer/src/modules/EdgesStyling/SingleEdgeStyling.tsx	0.00%	158 Missing ⚠️
...rer/src/modules/NodesStyling/SingleNodeStyling.tsx	0.00%	152 Missing and 1 partial ⚠️
.../src/modules/CreateConnection/CreateConnection.tsx	0.00%	145 Missing ⚠️
...lorer/src/workspaces/Settings/LoadConfigButton.tsx	0.00%	131 Missing ⚠️
...ckages/graph-explorer/src/components/NewSelect.tsx	0.00%	109 Missing and 1 partial ⚠️
packages/graph-explorer/src/components/Dialog.tsx	0.00%	96 Missing and 1 partial ⚠️
...ages/graph-explorer/src/components/AlertDialog.tsx	0.00%	94 Missing and 1 partial ⚠️
...h-explorer/src/modules/Namespaces/UserPrefixes.tsx	0.00%	81 Missing ⚠️
...orer/src/components/PanelEmptyState/EmptyState.tsx	0.00%	62 Missing and 1 partial ⚠️
packages/graph-explorer/src/components/Panel.tsx	0.00%	18 Missing ⚠️
... and 10 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #699      +/-   ##
==========================================
+ Coverage   14.88%   15.86%   +0.98%     
==========================================
  Files         566      540      -26     
  Lines       25121    23450    -1671     
  Branches     1170     1133      -37     
==========================================
- Hits         3739     3721      -18     
+ Misses      21050    19411    -1639     
+ Partials      332      318      -14     

Flag	Coverage Δ
unittests	15.86% <0.00%> (+0.98%)	⬆️

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[kmcginnes]

Bug found where the select menu items can not be selected. It might be possible that I need to convert them to use the new select component because of the use of React Portals in the new Dialog component.