feat(homepage): add mod manager section and related content

- Introduced new strings for the mod manager feature in the English localization file.
- Updated the homepage to include a dedicated section for the GregModManager, featuring a description, download link, and hints for the latest release.
- Adjusted button styles for better consistency and user experience.

This commit enhances the homepage by providing users with direct access to the mod manager and its functionalities.

docs/guides/mod-developers/greg-hooks-showcase.md

@@ -0,0 +1,41 @@
+---
+title: Greg hooks showcase (sample mod)
+sidebar_label: Greg hooks showcase
+description: How to subscribe to greg.* hooks via GregShowcaseMod and gregFramework.Core APIs.
+---
+
+# Greg hooks showcase
+
+The repository includes **GregShowcaseMod** (`mods/GregShowcaseMod/` in **gregFramework**): a minimal MelonLoader mod that logs one representative event per **GregDomain**, using only public APIs:
+
+- `GregEventDispatcher.On` / `UnregisterAll`
+- `GregHookName.Create(GregDomain.*, "Action")`
+- `GregPayload.Get` / `GregPayload.Dump` for anonymous payloads
+
+## Canonical hook strings
+
+Runtime hook names look like `greg.<DOMAIN>.<Action>`, e.g. `greg.PLAYER.MoneyChanged`. Build the string with `GregHookName.Create` — do not concatenate raw strings in mods.
+
+## Registry file
+
+`greg_hooks.json` (shipped beside `FrikaModdingFramework.dll`) is generated from `MergedCode.md` by:
+
+```bash
+pwsh gregCore/scripts/Generate-GregHooksFromMergedCode.ps1
+```
+
+Options are passed through to `parse_merged_code.py` (e.g. `--no-hot-loops` to omit `Update`/`FixedUpdate` from the catalog). The dump is large; regeneration can take several minutes.
+
+## Sample subscriptions
+
+See `mods/GregShowcaseMod/Handlers/*.cs` — each file registers one hook for its domain (except **POWER**, where `GregPowerHooks` is still empty until Il2Cpp types are classified).
+
+## Configuration
+
+Copy `mods/GregShowcaseMod/modconfig.example.json` to `{Game}/Mods/GregShowcaseMod/modconfig.json` to toggle per-domain logging.
+
+## See also
+
+- [Mod developers (hub)](./overview)
+- [System architecture principles](/wiki/meta/system-architecture-principles)
+- [Framework](/wiki/mods/framework) — runtime overview