feat: dict based Hyphenation (#305)

## Summary

* Adds (optional) Hyphenation for English, French, German, Russian
languages

## Additional Context

* Included hyphenation dictionaries add approximately 280kb to the flash
usage (German alone takes 200kb)
* Trie encoded dictionaries are adopted from hypher project
(https://github.com/typst/hypher)
* Soft hyphens (and other explicit hyphens) take precedence over
dict-based hyphenation. Overall, the hyphenation rules are quite
aggressive, as I believe it makes more sense on our smaller screen.

---------

Co-authored-by: Dave Allie <dave@daveallie.com>

lib/Epub/Epub/hyphenation/LanguageRegistry.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <cstddef>
+#include <string>
+
+#include "LanguageHyphenator.h"
+
+struct LanguageEntry {
+  const char* cliName;
+  const char* primaryTag;
+  const LanguageHyphenator* hyphenator;
+};
+
+struct LanguageEntryView {
+  const LanguageEntry* data;
+  size_t size;
+
+  const LanguageEntry* begin() const { return data; }
+  const LanguageEntry* end() const { return data + size; }
+};
+
+// Returns the Liang-backed hyphenator for a given primary language tag (e.g., "en", "fr").
+const LanguageHyphenator* getLanguageHyphenatorForPrimaryTag(const std::string& primaryTag);
+
+// Exposes the list of supported languages primarily for tooling/tests.
+LanguageEntryView getLanguageEntries();