build: updates versioning configuration

Updates the versioning configuration to align with the new project requirements.

This includes:
- Changing the version number to 0.1.
- Updating the `publicReleaseRefSpec` to include tags with the format vX.Y.Z.
- Enabling build number generation in cloud builds.
- Configuring NuGet package versioning to use SemVer 2.
- Defining a release branch naming scheme.
- Setting a fixed length for shortened Git commit IDs.
- Adding build metadata to include the commit ID.
- Configuring prerelease tagging for feature, bugfix, and release branches.

Author: jeffrey-onspec

version.json

@@ -1,10 +1,34 @@
 {
-  "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "1.0",
+  "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/main/src/NerdBank.GitVersioning/version.schema.json",
+  "version": "0.1",
   "publicReleaseRefSpec": [
-    "^refs/tags/v\\d+\\.\\d+\\.\\d+(?:-.*)?$"
+    "^refs/heads/main$",
+    "^refs/tags/v\\d+\\.\\d+\\.\\d+$"
   ],
   "cloudBuild": {
+    "buildNumber": {
+      "enabled": true
+    },
     "setVersionVariables": true
+  },
+  "nugetPackageVersion": {
+    "semVer": 2
+  },
+  "release": {
+    "branchName": "release/v{version}",
+    "firstUnstableTag": "rc"
+  },
+  "gitCommitIdShortFixedLength": 8,
+  "versionHeightOffset": 0,
+  "buildMetadata": {
+    "commitId": true
+  },
+  "prerelease": {
+    "tag": "alpha",
+    "branches": {
+      "feature/": "alpha",
+      "bugfix/": "alpha",
+      "release/": "rc"
+    }
   }
 }