fix: FE loading button on login page, resolves #1122

Walkthrough

The changes in the Login.jsx component enhance the login process by introducing a loading state. A LoadingButton from @mui/lab is now used for the submission action, providing visual feedback during login requests. The component accesses the authentication state via the useSelector hook, allowing it to reflect the loading status. Minor adjustments ensure the new button maintains the previous visual style, while the overall structure of the login steps remains unchanged.

Changes

File Path	Change Summary
Client/src/Pages/Auth/Login.jsx	- Added `LoadingButton` for login submission. - Integrated `useSelector` to access `authState`. - Minor adjustments to button properties for visual consistency.
Client/src/Utils/Theme/globalTheme.js	- Modified `MuiButton` style overrides for disabled state to exclude buttons with `loadingIndicator` class. - Improved organization by separating `MuiButton` styles from `MuiIconButton` styles.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant StepTwo
    participant ReduxStore

    User->>StepTwo: Click Login
    StepTwo->>ReduxStore: Dispatch login action
    ReduxStore-->>StepTwo: Update authState.isLoading to true
    StepTwo->>User: Show LoadingButton
    Note over StepTwo: Login request in progress
    ReduxStore-->>StepTwo: Update authState.isLoading to false
    StepTwo->>User: Hide LoadingButton

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bluewave-labs / checkmate