Installation instructions for Debian 12 (bookworm)

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Hi all,

I didn't find a more appropriate issue type for this, sorry if it's wrong. I tried to install LTFS on a Debian 12 (bookworm) machine, but had a hard time figuring out the required dependencies. Here's what I've found with some trial and error:

```
build-essential automake autoconf libtool fuse libfuse-dev uuid uuid-dev libxml2 libxml2-dev pkg-config icu-devtools libicu-dev libsnmp-dev
```

Maybe I overdid and something is not really required, but at least this allowed me to compile and install LTFS.

**But**: With the stable branch `v2.4-stable`, I needed some time to figure out a required change in `configure.ac` due to `icu-config` being deprecated and not available anymore:
```patch
diff --git a/configure.ac b/configure.ac
index f28d2b2..9453572 100644
--- a/configure.ac
+++ b/configure.ac
@@ -341,7 +341,7 @@ ICU_MODULE_CFLAGS="`icu-config --cppflags 2> /dev/null`";
ICU_MODULE_LIBS="`icu-config --ldflags 2> /dev/null`";
if test -z "$ICU_MODULE_LIBS"
then
- PKG_CHECK_MODULES([ICU_MODULE], [icu >= 0.21])
+ PKG_CHECK_MODULES([ICU_MODULE], [icu-i18n >= 0.21])
fi

AC_MSG_CHECKING([use latest ICU])
```

I see that this has already been integrated in `master` (with `icu-uc` instead of `icu-i18n`, but this probably doesn't matter), so it should not be required anymore.

Maybe it would help other people to provide at least the package list in the README. Of course, unless it is already there and I'm just not seeing it :S

Thanks!

Inizia esaminando il README e i controlli delle dipendenze in configure.ac, confrontandoli con l’elenco dei pacchetti Debian 12 nell’issue. Conferma la configurazione attuale di ICU in master e v2.4-stable. Il lavoro è completato quando il README documenta chiaramente i pacchetti Debian richiesti e qualsiasi differenza di installazione rilevante.

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