Initial tia-lsp package definition

Mason registry for the tia-lsp language server. Uses pkg:generic source
with a build script that clones the tagged release from Gitea and creates
a bin/tia-lsp wrapper script that runs the Lua LSP server.

packages/tia-lsp/package.yaml

@@ -0,0 +1,26 @@
+---
+name: tia-lsp
+description: Language server for Siemens TIA Portal languages (SCL, with planned STL/AWL, LAD, FBD support).
+homepage: https://gitea.l-tech.rs/lazar/tia-lsp
+licenses:
+  - MIT
+languages:
+  - SCL
+categories:
+  - LSP
+
+source:
+  id: pkg:generic/tia-lsp@0.1.0
+  build:
+    run: |
+      git clone --depth 1 --branch v{{version}} https://gitea.l-tech.rs/lazar/tia-lsp.git tia-lsp-src
+      cp -r tia-lsp-src/src ./src
+      mkdir -p bin
+      cat > bin/tia-lsp << 'EOF'
+#!/bin/bash
+exec lua "$(dirname "$0")/../src/main.lua" "$@"
+EOF
+      chmod +x bin/tia-lsp
+
+bin:
+  tia-lsp: bin/tia-lsp