Update scripts to use the new Quality mappings to urls (dotnet#10479)

## Key Changes

### 1. **Quality Level Behavior**
- **`dev`**: Downloads latest development builds from the `main` branch
- **`staging`**: Downloads release candidate builds (rc/daily)
- **`ga`**: Downloads generally available release builds (ga/daily)
- **Default**: `staging` quality is used when no quality is specified

### 2. **Updated URL Mappings for Quality Levels**
- **PowerShell Script (`get-aspire-cli.ps1`)**:
  - `dev` quality now maps to: `https://aka.ms/dotnet/9/aspire/daily`
  - `staging` quality now maps to: `https://aka.ms/dotnet/9/aspire/rc/daily`
  - `ga` quality now maps to: `https://aka.ms/dotnet/9/aspire/ga/daily`

- **Bash Script (`get-aspire-cli.sh`)**:
  - Updated with corresponding URL mappings to match PowerShell script
  - Consistent quality-to-URL mapping across both script implementations

### 3. **Support for -WhatIf and --dry-run**
- This will be useful for testing

### 4. **Code Quality Improvements**
The code has been made more idiomatic in many ways:
- Better PowerShell coding practices and conventions
- Improved error handling patterns
- Enhanced cross-platform compatibility
- More robust parameter validation
- Cleaner function organization and separation of concerns

Co-authored-by: Copilot <[email protected]>
(cherry picked from commit a5d2813)

Author: radical

docs/using-latest-daily.md

@@ -43,12 +43,24 @@ On Windows:
 iex "& { $(irm https://github.com/dotnet/aspire/raw/refs/heads/main/eng/scripts/get-aspire-cli.ps1) }"
 ```
 
+or with arguments like:
+
+```powershell
+iex "& { $(irm https://github.com/dotnet/aspire/raw/refs/heads/main/eng/scripts/get-aspire-cli.ps1) } -Quality staging"
+```
+
 On Linux, or macOS:
 
 ```sh
 curl -sSL https://github.com/dotnet/aspire/raw/refs/heads/main/eng/scripts/get-aspire-cli.sh | bash
 ```
 
+or with arguments like:
+
+```sh
+curl -sSL https://github.com/dotnet/aspire/raw/refs/heads/main/eng/scripts/get-aspire-cli.sh | bash -s -- -q staging
+```
+
 <!-- break between blocks -->
 
 ## Create a new Project

eng/scripts/README.md

@@ -9,11 +9,11 @@ This directory contains scripts to download and install the Aspire CLI for diffe
 
 ## Current Limitations
 
-⚠️ **Important**: Currently, only the following combination works:
-- **Version**: `9.0`
-- **Quality**: `daily`
+Supported Quality values:
 
-Other version/quality combinations are not yet available through the download URLs.
+- `dev` - builds from the `main` branch
+- `staging` - builds from the current `release` branch like `release/9.4`
+- `ga` - build for the latest GA
 
 ## Parameters
 
@@ -23,7 +23,7 @@ Other version/quality combinations are not yet available through the download UR
 |------------------|-------|---------------------------------------------------|-----------------------|
 | `--install-path` | `-i`  | Directory to install the CLI                      | `$HOME/.aspire/bin`   |
 | `--version`      |       | Version of the Aspire CLI to download             | `9.0`                 |
-| `--quality`      | `-q`  | Quality to download                               | `daily`               |
+| `--quality`      | `-q`  | Quality to download                               | `release`             |
 | `--os`           |       | Operating system (auto-detected if not specified) | auto-detect           |
 | `--arch`         |       | Architecture (auto-detected if not specified)     | auto-detect           |
 | `--keep-archive` | `-k`  | Keep downloaded archive files after installation  | `false`               |
@@ -32,15 +32,15 @@ Other version/quality combinations are not yet available through the download UR
 
 ### PowerShell Script (`get-aspire-cli.ps1`)
 
-| Parameter       | Description                                       | Default                          |
-|-----------------|---------------------------------------------------|----------------------------------|
-| `-InstallPath`  | Directory to install the CLI                     | `$HOME/.aspire/bin` (Unix) / `%USERPROFILE%\.aspire\bin` (Windows) |
-| `-Version`      | Version of the Aspire CLI to download             | `9.0`                            |
-| `-Quality`      | Quality to download                               | `daily`                          |
-| `-OS`           | Operating system (auto-detected if not specified) | auto-detect                      |
-| `-Architecture` | Architecture (auto-detected if not specified)     | auto-detect                      |
-| `-KeepArchive`  | Keep downloaded archive files after installation  | `false`                          |
-| `-Help`         | Show help message                                 |                                  |
+| Parameter       | Description                                       | Default                                                            |
+|-----------------|---------------------------------------------------|--------------------------------------------------------------------|
+| `-InstallPath`  | Directory to install the CLI                      | `$HOME/.aspire/bin` (Unix) / `%USERPROFILE%\.aspire\bin` (Windows) |
+| `-Version`      | Version of the Aspire CLI to download             | `9.0`                                                              |
+| `-Quality`      | Quality to download                               | `release`                                                          |
+| `-OS`           | Operating system (auto-detected if not specified) | auto-detect                                                        |
+| `-Architecture` | Architecture (auto-detected if not specified)     | auto-detect                                                        |
+| `-KeepArchive`  | Keep downloaded archive files after installation  | `false`                                                            |
+| `-Help`         | Show help message                                 |                                                                    |
 
 ## Install Path Parameter