feat: publish Gamertan Tend preview source

Sanitized root snapshot from private source commit a72903c63e1753f9e6ffbf40453c0830bdfc05c5 and tree 295641e67eef5979da76746d8ae271249568263e. Private development history and workflows are excluded by the exact allowlist.

AI-assisted: OpenAI Codex helped implement, test, and audit this preview.
Signed-off-by: Cole Speelman <crspeelman@gmail.com>

internal/version/version.go

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+
+package version
+
+var (
+	Version = "v0.1.0-dev"
+	Commit  = "unknown"
+	Date    = "unknown"
+)