Initialize packwiz modpack (Fabric 1.20.4)

- pack.toml: Pack metadata targeting Minecraft 1.20.4 + Fabric 0.15.11
- index.toml: File index with SHA256 hashes
- mods/fabric-api.pw.toml: Fabric API 0.97.3+1.20.4 (Modrinth)
- mods/webstreamer.pw.toml: WebStreamer 1.5.0 (Modrinth)
- README.md: Setup instructions for server and client

Co-authored-by: Cursor <cursoragent@cursor.com>

README.md

@@ -1,2 +1,32 @@
 # mc-modpack
-Packwiz modpack for Bennett's Modded Minecraft Server (Fabric 1.20.4)
+
+Packwiz modpack for **Bennett's Modded Minecraft Server** (Fabric 1.20.4).
+
+## Server-Side Auto-Sync
+
+The `minecraft-modded` Docker container auto-syncs mods from this repo at startup via the `PACKWIZ_URL` environment variable pointing to `pack.toml` on the `main` branch.
+
+## Client-Side Setup
+
+Players should install:
+
+1. **Fabric Loader** for Minecraft 1.20.4
+2. **packwiz-installer-bootstrap** as a pre-launch command in their launcher (MultiMC/Prism)
+3. Point it at: `https://gitea.bennettdavid.com/bee8333/mc-modpack/raw/branch/main/pack.toml`
+
+This will auto-download all required client mods to match the server.
+
+## Included Mods
+
+| Mod | Version | Side | Source |
+|-----|---------|------|--------|
+| Fabric API | 0.97.3+1.20.4 | Both | [Modrinth](https://modrinth.com/mod/fabric-api) |
+| WebStreamer | 1.5.0 | Both | [Modrinth](https://modrinth.com/mod/webstreamer) |
+
+## Adding Mods
+
+To add a mod, create a `.pw.toml` file in the `mods/` directory with the appropriate Modrinth metadata, then update `index.toml` and `pack.toml` hashes accordingly. If you have `packwiz` installed locally, use `packwiz modrinth install <mod-slug>` instead.
+
+## Mod Approval
+
+Only admins can push to `main`. Contributors can submit mod requests as issues or pull requests.