chore: Remove deprecated Gitea workflows and add new CI/CD configurations

.gitea/release-template.md

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+## SZCI {{VERSION}}
+
+Pre-compiled binaries for multiple platforms.
+
+### Installation
+
+#### Option 1: Via npm (recommended)
+```bash
+npm install -g @ship.zone/szci
+```
+
+#### Option 2: Via installer script
+```bash
+curl -sSL https://code.foss.global/ship.zone/szci/raw/branch/master/install.sh | sudo bash
+```
+
+#### Option 3: Direct binary download
+Download the appropriate binary for your platform from the assets below and make it executable.
+
+### Supported Platforms
+- Linux x86_64 (x64)
+- Linux ARM64 (aarch64)
+- macOS x86_64 (Intel)
+- macOS ARM64 (Apple Silicon)
+- Windows x86_64
+
+### Checksums
+SHA256 checksums are provided in `SHA256SUMS.txt` for binary verification.
+
+### npm Package
+The npm package includes automatic binary detection and installation for your platform.