Improve Connection Dialog - Advanced Settings panel

[croblesm]

The Advanced Connection Settings panel in the MSSQL extension needs an updated layout to make it simpler and more intuitive. The changes should include:

• Search Settings: Add a "Search settings" textbox at the top.
• General Category: Introduce a new top category called General (for core settings) that is expanded by default but can be collapsed.
• Connection Type Visibility: Move Connection Type (Application intent) under General and display it more prominently with radio buttons for “Read & Write Mode (Default)” vs. “Read-Only Mode.”
• Restructure Categories: Reorganize the remaining settings to be more intuitive (e.g., combine Failover & Replication, remove the Database Initialization category).

Below is a reference screenshot (example of how the collapsed/expanded sections might appear):

Proposed Layout Tree for the panel:

Advanced Connection Settings
├── General (Top-level / Core Settings)
│   ├── Port
│   ├── Application name (Default: vscode-mssql)
│   ├── Connection timeout (seconds - Default: 30)
│   ├── Connection Type (Application intent)
│   │   ├── Read & Write Mode (Default)
│   │   └── Read-Only Mode
│   └── Multi-subnet failover (Checkbox)
├── Security & Encryption
│   ├── Always Encrypted
│   │   ├── Disabled
│   │   └── Enabled
│   ├── Secure Enclaves
│   │   ├── Disabled
│   │   └── Enabled
│   ├── Attestation Protocol
│   │   ├── Host Guardian Service
│   │   └── Azure Attestation
│   ├── Enclave Attestation URL
│   ├── Persist security info (Checkbox)
│   ├── Host name in certificate
│   └── Type system version
├── Connection Resiliency
│   ├── Command timeout
│   ├── Connect retry count
│   └── Connect retry interval
├── Failover & Replication
│   ├── Replication (Checkbox)
│   └── Failover partner
├── Pooling Settings
│   ├── Pooling (Checkbox)
│   ├── Min pool size
│   ├── Max pool size
│   ├── Load balance timeout
│   └── Packet size
└── Data Source & Context
    ├── Context connection (Checkbox)
    ├── Workstation ID
    ├── Current language
    └── Attach DB filename

[croblesm]

cc @jdesai-24

[Benjin]

Moving this out because this is coming in too late for Ask Mode this month.