fix(lsp): match wildcard root markers like *.cabal

[LinHoMo]

Issue for this PR

Closes #41168

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Filesystem.up() in packages/opencode/src/util/filesystem.ts walks up the directory tree and yields any target it finds, but it only ever does a literal exists(join(current, target)) probe. Four language servers declare their root with glob markers, so that probe can never match them:

• HLS -> *.cabal
• TerraformLS -> *.tf
• JuliaLS -> *.jl
• SourceKit -> *.xcodeproj, *.xcworkspace

exists("/repo/pkg-a/*.cabal") is always false, so NearestRoot yields nothing and silently falls back to the workspace root. In a multi-package Haskell repo every package ends up with the repo root as its LSP root, and the same happens for Terraform submodules, Julia packages and Xcode projects.

Fix: when a target contains *, scan the directory with Glob.scan instead of probing an exact path. include: "all" is required rather than "file", because *.xcodeproj and *.xcworkspace are directory bundles, not files.

Literal targets keep the existing exists path, so their behaviour is unchanged. Filesystem.up is only consumed by lsp/server.ts, so the blast radius is limited to root detection.

How did you verify your code works?

Added packages/opencode/test/lsp/glob-root.test.ts. It builds temp workspaces containing *.cabal, *.tf, *.jl and an *.xcodeproj directory, and asserts each server resolves the nested package directory instead of the workspace root, plus one literal-marker case as a control.

• With the fix: 5 pass.
• Reverting only the up() change: 4 fail, 1 pass (the literal control still passes). So the test genuinely guards this behaviour rather than passing either way.

Run with bun test test/lsp/glob-root.test.ts from packages/opencode. oxlint reports no new errors on the two touched files.

Caveat: I don't have the Haskell/Swift/Julia toolchains installed, so this verifies root resolution only, not a live language server session.

Screenshots / recordings

Not a UI change.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

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