opencode: refine build flags and remove unused tree-sitter dependency

Synchronize the build command with `packages/opencode/script/publish.ts` by:  
-  Adding `--define OPENCODE_TUI_PATH` to explicitly inject the TUI path during the build  
-  Removing the `--minify` flag from the bun build command

Removing the `--minify` flag resolves the error:  
"Cannot find module '/$bunfs/root/../../../tree-sitter-zw03zjvh.node' from '/$bunfs/root/opencode'"  
which occurred when letting the AI run bash commands.

Fixes #430293

pkgs/by-name/op/opencode/package.nix

@@ -7,7 +7,6 @@
   models-dev,
   nix-update-script,
   testers,
-  tree-sitter,
   writableTmpDirAsHomeHook,
 }:
 
@@ -108,8 +107,6 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     outputHashMode = "recursive";
   };
 
-  buildInputs = [ tree-sitter ];
-
   nativeBuildInputs = [
     bun
     models-dev
@@ -135,13 +132,12 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     runHook preBuild
 
     bun build \
+      --define OPENCODE_TUI_PATH="'${finalAttrs.tui}/bin/tui'" \
       --define OPENCODE_VERSION="'${finalAttrs.version}'" \
       --compile \
-      --minify \
       --target=${bun-target.${stdenvNoCC.hostPlatform.system}} \
       --outfile=opencode \
       ./packages/opencode/src/index.ts \
-      ${finalAttrs.tui}/bin/tui
 
     runHook postBuild
   '';