Tools and prompts list are difficult to review

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

macOS 15.4.1 (24E263)

### Expected behaviour

### 1. Sorting
Right now, the output of `/prompts` and `/tools` doesn't seem to be sorted in any particular order. This makes it hard to review this list and locate a specific prompt or tool.

### 2. Tool name mangling
Tool names are always shown mangled with the mcp server name prefixed, i.e. instead of:
```
sqlite (MCP):
- append_insight * not trusted
- create_table * not trusted
- describe_table * not trusted
- list_tables * not trusted
- read_query * not trusted
- write_query * not trusted
```
we show the below, which is much harder to read:
```
sqlite (MCP):
- sqlite___append_insight * not trusted
- sqlite___create_table * not trusted
- sqlite___describe_table * not trusted
- sqlite___list_tables * not trusted
- sqlite___read_query * not trusted
- sqlite___write_query * not trusted
```

### Actual behaviour

### 1. Sorting
Sort the output of `/prompts` and `/tools` as described below (and as noted [in the PRD](https://quip-amazon.com/FqMKA1y81REl/MCP-support-in-Q-Developer#temp:C:Maa60df3b78246f409385476a135)):

In the output of `/prompts`:
1. The MCP groups should be displayed in alphabetical order
2. Within each group, the prompts for that group should be displayed in alphabetical order

In the output of `/tools`:
1. The "Built-in" group should be shown first
2. Then, the MCP groups should be displayed in alphabetical order
3. Within each group, the tools for that group should be displayed in alphabetical order

### 2. Tool name mangling
Don't mangle tool names in the output. Tool names are already shown grouped into MCP servers, so there is no need to prefix the MCP server name to the toolname.

(On a related note, this is not just a display issue. We should not be unnecessarily mangling tool names when there is no name conflict. [See the PRD](https://quip-amazon.com/FqMKA1y81REl/MCP-support-in-Q-Developer#temp:C:Maa389ccd4778c44890952b9c8ab).)

### Steps to reproduce

Run the `/tools` or `/prompts` command.

### Environment

```yaml

[q-details]
version = "1.9.1"
hash = "5d2c2807cab9bc6c9dc5fcd05f92c7a979e8a4f7"
date = "2025-04-29T06:22:42.917989Z (10d ago)"
variant = "full"

[system-info]
os = "macOS 15.4.1 (24E263)"
chip = "Apple M3"
total-cores = 8
memory = "24.00 GB"

[environment]
cwd = "/Users/USER"
cli-path = "/Users/USER"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "macOS"
install-method = "brew"

[env-vars]
PATH = "/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin"
QTERM_SESSION_ID = "861875d35e244fd9b7bd54ce51e9e6a9"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.9.1"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.apple.Terminal"
```

Inizia eseguendo i comandi `/tools` e `/prompts` con i gruppi MCP per osservare l'ordine attuale e i nomi visualizzati. Traccia i punti di ingresso dei comandi e la logica esistente di raggruppamento MCP; il lavoro è completato quando Built-in appare per primo per gli strumenti, i gruppi MCP e le relative voci sono in ordine alfabetico, i prompt sono raggruppati alfabeticamente e i nomi degli strumenti non sono più preceduti da prefissi non necessari.

Scritto dal modello di indicizzazione a partire dal testo della issue.