fix: resolve symlink in bin wrapper with readlink -f

Mason's bin/ directory contains a symlink to the actual wrapper script
in packages/<name>/bin/. The wrapper used $(dirname "$0") which
resolved to mason/bin/ (the symlink location), then ../src/main.lua
pointed to mason/src/main.lua which doesn't exist.

Use readlink -f to resolve the symlink first, so dirname points to
packages/tia-lsp/bin/ and ../src/main.lua correctly resolves to
packages/tia-lsp/src/main.lua.

packages/tia-lsp/package.yaml

@@ -18,7 +18,7 @@ source:
       git clone --depth 1 --branch "v$VERSION" https://gitea.l-tech.rs/lazar/tia-lsp.git tia-lsp-src
       cp -r tia-lsp-src/src ./src
       mkdir -p bin
-      printf '#!/bin/bash\nexec lua "$(dirname "$0")/../src/main.lua" "$@"\n' > bin/tia-lsp
+      printf '#!/bin/bash\nexec lua "$(dirname "$(readlink -f "$0")")/../src/main.lua" "$@"\n' > bin/tia-lsp
       chmod +x bin/tia-lsp
 
 bin: