integrations install intellij-plugin fails on IntelliJ 2024.2+ with missing field JVMOptions

### 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 26.2.0 (25C56)

### Expected behaviour

Installer completes and plugin is installed

### Actual behaviour

```
error: Couldn't get JVM properties for IDEA Ultimate: Custom("Could not read
plist file: Error { inner: ErrorImpl { kind: Serde("missing field
JVMOptions"), file_position: None } }")
```

Confirmed via PlistBuddy that the key is genuinely absent:

```
$ /usr/libexec/PlistBuddy -c "Print :JVMOptions"
"/Applications/IntelliJ IDEA.app/Contents/Info.plist"
Print: Entry, ":JVMOptions", Does Not Exist
```

### Steps to reproduce

1. Install IntelliJ IDEA Ultimate 2026.1 (build IU-261.22158.277) at
`/Applications/IntelliJ IDEA.app`.
2. Run:

kiro-cli integrations install intellij-plugin

### Environment

```yaml
[q-details]
version = "2.2.0"
hash = "c96876dd5075aa453fe731882a863ab8216a9a3a"
date = "2026-04-28T21:18:48Z"
variant = "full"

[system-info]
os = "macOS 26.2.0 (25C56)"
chip = "Apple M1 Max"

[environment]
install-method = "brew"
shell-path = "/opt/local/bin/bash"

[intellij]
app = "/Applications/IntelliJ IDEA.app"
CFBundleShortVersionString = "2026.1"
CFBundleVersion = "IU-261.22158.277"
```

Inizia riproducendo `kiro-cli integrations install intellij-plugin` con l'installazione di IntelliJ IDEA in `/Applications/IntelliJ IDEA.app`, quindi verifica come l'installer legge il file `Contents/Info.plist` e gestisce l'assenza della chiave `JVMOptions`. Il lavoro è completato quando l'installer termina e il plugin IntelliJ viene installato senza l'errore relativo al campo mancante.

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