dev-util/gitea-runner: new package at 1.0.4

Initial azy5030 overlay: scaffolding (eselect repository), the
dev-util/gitea-runner ebuild (go-module, vendored), CI build validation,
and a daily upstream-bump workflow.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

dev-util/gitea-runner/metadata.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>azy5030@gmail.com</email>
+		<name>Ali Zein Yousuf</name>
+	</maintainer>
+	<longdescription lang="en">
+		Gitea Actions runner (formerly act_runner): executes Gitea Actions
+		workflows using a Docker or host backend. Packaged from upstream
+		source (https://gitea.com/gitea/runner) with a vendored Go module tree.
+	</longdescription>
+</pkgmetadata>