transient storage keyword incorrectly marked as variable name

[JordanRaphael]

Description

The extension does not recognize the transient storage keyword that is fully supported since Solidity 0.8.28.
Instead, it is highlighted/parsed as if it were a variable identifier.

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Steps to Reproduce

1. Create a new Solidity file with pragma ^0.8.28.

2. Define a contract that uses the transient keyword in storage variables, e.g.:

   pragma solidity ^0.8.28;
   
   contract Example {
       uint256 transient temp;
   }

3. Observe that the transient keyword is marked as a StateVar and the variable name is ignored.

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Expected Behavior

The transient keyword should be highlightedas a storage modifier, similar to constant or immutable.

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Actual Behavior

The extension highlights transient as if it were a variable name, not a recognized keyword.

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Environment

• Solidity Extension version: 0.0.185
• Solidity version: ^0.8.28

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Additional Context

I’d be happy to contribute a fix for this issue with some guidance.