feat: add Windows package manager support (Scoop, winget)

- Add Scoop manifest with autoupdate support
- Add winget manifest files for Windows Package Manager
- Update README with Scoop and winget installation instructions
- Update roadmap to reflect completed package manager goals

Closes #9

Author: m_igashi

README.md

@@ -24,7 +24,18 @@ mp3rgain adjusts MP3 volume without re-encoding by modifying the `global_gain` f
 
 ### Windows
 
-**Download and extract** (recommended for most users):
+**Scoop** (recommended):
+```powershell
+scoop bucket add mp3rgain https://github.com/M-Igashi/scoop-bucket
+scoop install mp3rgain
+```
+
+**winget**:
+```powershell
+winget install M-Igashi.mp3rgain
+```
+
+**Download and extract**:
 
 1. Download the latest release from [GitHub Releases](https://github.com/M-Igashi/mp3rgain/releases):
    - `mp3rgain-*-windows-x86_64.zip` (most Windows PCs)

docs/roadmap.md

@@ -51,8 +51,8 @@ All core functionality complete:
 
 ### v1.2.0 - Package Manager Expansion
 
-- [ ] Scoop package (Windows) - *in progress*
-- [ ] winget package (Windows Package Manager)
+- [x] Scoop package (Windows)
+- [x] winget package (Windows Package Manager)
 - [ ] Homebrew core inclusion
 - [ ] AUR package (Arch Linux)
 - [ ] Nix package

packages/scoop/mp3rgain.json

@@ -0,0 +1,31 @@
+{
+    "version": "1.1.0",
+    "description": "Lossless MP3 volume adjustment - a modern mp3gain replacement written in Rust",
+    "homepage": "https://github.com/M-Igashi/mp3rgain",
+    "license": "MIT",
+    "architecture": {
+        "64bit": {
+            "url": "https://github.com/M-Igashi/mp3rgain/releases/download/v1.1.0/mp3rgain-v1.1.0-windows-x86_64.zip",
+            "hash": "50018229acef9ea9fd388b46edeef94d3f9d7889f2a021167dc241810c235d1e"
+        },
+        "arm64": {
+            "url": "https://github.com/M-Igashi/mp3rgain/releases/download/v1.1.0/mp3rgain-v1.1.0-windows-arm64.zip",
+            "hash": "d56c1a27bdf4cf376014f33ec4ed7082282facf1d0c52706dbd3a8527cb3ab00"
+        }
+    },
+    "bin": "mp3rgain.exe",
+    "checkver": "github",
+    "autoupdate": {
+        "architecture": {
+            "64bit": {
+                "url": "https://github.com/M-Igashi/mp3rgain/releases/download/v$version/mp3rgain-v$version-windows-x86_64.zip"
+            },
+            "arm64": {
+                "url": "https://github.com/M-Igashi/mp3rgain/releases/download/v$version/mp3rgain-v$version-windows-arm64.zip"
+            }
+        },
+        "hash": {
+            "url": "$url.sha256"
+        }
+    }
+}

packages/winget/M-Igashi.mp3rgain.installer.yaml

@@ -0,0 +1,21 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.installer.1.6.0.schema.json
+
+PackageIdentifier: M-Igashi.mp3rgain
+PackageVersion: 1.1.0
+Platform:
+  - Windows.Desktop
+MinimumOSVersion: 10.0.0.0
+InstallerType: zip
+NestedInstallerType: portable
+NestedInstallerFiles:
+  - RelativeFilePath: mp3rgain.exe
+    PortableCommandAlias: mp3rgain
+Installers:
+  - Architecture: x64
+    InstallerUrl: https://github.com/M-Igashi/mp3rgain/releases/download/v1.1.0/mp3rgain-v1.1.0-windows-x86_64.zip
+    InstallerSha256: 50018229ACEF9EA9FD388B46EDEEF94D3F9D7889F2A021167DC241810C235D1E
+  - Architecture: arm64
+    InstallerUrl: https://github.com/M-Igashi/mp3rgain/releases/download/v1.1.0/mp3rgain-v1.1.0-windows-arm64.zip
+    InstallerSha256: D56C1A27BDF4CF376014F33EC4ED7082282FACF1D0C52706DBD3A8527CB3AB00
+ManifestType: installer
+ManifestVersion: 1.6.0

packages/winget/M-Igashi.mp3rgain.locale.en-US.yaml

@@ -0,0 +1,31 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.defaultLocale.1.6.0.schema.json
+
+PackageIdentifier: M-Igashi.mp3rgain
+PackageVersion: 1.1.0
+PackageLocale: en-US
+Publisher: Masanari Higashi
+PublisherUrl: https://github.com/M-Igashi
+Author: Masanari Higashi
+PackageName: mp3rgain
+PackageUrl: https://github.com/M-Igashi/mp3rgain
+License: MIT
+LicenseUrl: https://github.com/M-Igashi/mp3rgain/blob/master/LICENSE
+ShortDescription: Lossless MP3 volume adjustment - a modern mp3gain replacement written in Rust
+Description: |-
+  mp3rgain adjusts MP3 volume without re-encoding by modifying the global_gain field in each frame's side information.
+  This preserves audio quality while achieving permanent volume changes.
+  Features include ReplayGain analysis, AAC/M4A support, and full mp3gain command-line compatibility.
+Moniker: mp3rgain
+Tags:
+  - audio
+  - cli
+  - gain
+  - lossless
+  - mp3
+  - music
+  - replaygain
+  - rust
+  - volume
+ReleaseNotesUrl: https://github.com/M-Igashi/mp3rgain/releases/tag/v1.1.0
+ManifestType: defaultLocale
+ManifestVersion: 1.6.0

packages/winget/M-Igashi.mp3rgain.yaml

@@ -0,0 +1,8 @@
+# Created using winget CLI
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.version.1.6.0.schema.json
+
+PackageIdentifier: M-Igashi.mp3rgain
+PackageVersion: 1.1.0
+DefaultLocale: en-US
+ManifestType: version
+ManifestVersion: 1.6.0