Bulk convert control files. (#19986)

```
function Convert-Control {
    Param($full)
    .\vcpkg.exe format-manifest $full
    $root = $full.Substring(0, $full.Length - 7) # CONTROL
    $new = $root + 'vcpkg.json'
    $content = Get-Content -Raw $new
    $asJson = ConvertFrom-Json $content -AsHashtable -Depth 100
    $oldVersion = $asJson['port-version']
    if ($null -eq $oldVersion) {
        $oldVersionFull = $asJson['version-string']
        Write-Host "Got version $oldVersionFull"
        $match = [System.Text.RegularExpressions.Regex]::Match($oldVersionFull, '^(.+)-(\d+)$')
        if ($match.Success -and -not [System.Text.RegularExpressions.Regex]::IsMatch($oldVersionFull, '^\d\d\d\d-\d\d-\d\d$')) {
            $newFullVersion = [string]$match.Groups[1].Value
            $oldVersion = [int]$match.Groups[2].Value
            Write-Host "newFullVersion $newFullVersion oldVersion $oldVersion"
            $newVersion = $oldVersion + 1
            $asJson['version-string'] = $newFullVersion
            Write-Host "Previous version for $full extracted from version field -- setting version-string $newFullVersion and port-version $newVersion"
        } else {
            Write-Host "No previous version for $full -- setting 1"
            $newVersion = 1
        }
    } else {
        $newVersion = [int]$oldVersion + 1
        Write-Host "New version for $full : $newVersion"
    }

    $asJson['port-version'] = $newVersion

    $content = ConvertTo-Json $asJson -Depth 100
    Set-Content -Path $new -Value $content
    .\vcpkg.exe format-manifest $new
}

Get-ChildItem ports\CONTROL -Recurse | Foreach-Object {
    Convert-Control $_.FullName
}

git commit -am "this message"
.\vcpkg.exe x-add-version -all
git commit -a --amend
```

2 files changed, 65 insertions, 32 deletions

diff --git a/ports/coin/CONTROL b/ports/coin/CONTROL
deleted file mode 100644
index f5147e350..000000000
--- a/ports/coin/CONTROL
+++ /dev/null
@@ -1,32 +0,0 @@
-Source: coin
-Version: 4.0.0
-Port-Version: 2
-Description: A high-level 3D visualization library with Open Inventor 2.1 API
-Build-Depends: boost-assert, boost-config, boost-lexical-cast, boost-math, boost-smart-ptr, boost-static-assert, opengl-registry
-Homepage: https://github.com/coin3d/coin
-Default-Features: simage, zlib
-Supports: !(arm|arm64|uwp)
-
-Feature: bzip2
-Build-Depends: bzip2, freetype[bzip2]
-Description: Support bzip2 compressed fonts
-
-Feature: fontconfig
-Build-Depends: fontconfig
-Description: Use fontconfig for font support
-
-Feature: freetype
-Build-Depends: freetype
-Description: Use freetype for font support
-
-Feature: openal
-Build-Depends: openal-soft
-Description: Use OpenAL for sound support in VRML97
-
-Feature: simage
-Build-Depends: simage
-Description: Use simage for loading images (textures), audio, and animations
-
-Feature: zlib
-Build-Depends: zlib
-Description: Use zlib for reading/writing compressed files
diff --git a/ports/coin/vcpkg.json b/ports/coin/vcpkg.json
new file mode 100644
index 000000000..c9f254f77
--- /dev/null
+++ b/ports/coin/vcpkg.json
@@ -0,0 +1,65 @@
+{
+  "name": "coin",
+  "version-string": "4.0.0",
+  "port-version": 3,
+  "description": "A high-level 3D visualization library with Open Inventor 2.1 API",
+  "homepage": "https://github.com/coin3d/coin",
+  "supports": "!(arm | arm64 | uwp)",
+  "dependencies": [
+    "boost-assert",
+    "boost-config",
+    "boost-lexical-cast",
+    "boost-math",
+    "boost-smart-ptr",
+    "boost-static-assert",
+    "opengl-registry"
+  ],
+  "default-features": [
+    "simage",
+    "zlib"
+  ],
+  "features": {
+    "bzip2": {
+      "description": "Support bzip2 compressed fonts",
+      "dependencies": [
+        "bzip2",
+        {
+          "name": "freetype",
+          "features": [
+            "bzip2"
+          ]
+        }
+      ]
+    },
+    "fontconfig": {
+      "description": "Use fontconfig for font support",
+      "dependencies": [
+        "fontconfig"
+      ]
+    },
+    "freetype": {
+      "description": "Use freetype for font support",
+      "dependencies": [
+        "freetype"
+      ]
+    },
+    "openal": {
+      "description": "Use OpenAL for sound support in VRML97",
+      "dependencies": [
+        "openal-soft"
+      ]
+    },
+    "simage": {
+      "description": "Use simage for loading images (textures), audio, and animations",
+      "dependencies": [
+        "simage"
+      ]
+    },
+    "zlib": {
+      "description": "Use zlib for reading/writing compressed files",
+      "dependencies": [
+        "zlib"
+      ]
+    }
+  }
+}