feat: update to newest tree-sitter-objectscript commit and add language server

[hkimura-intersys]

Moves the objectscript-lsp and objectscript-core crates into this repo and wires the language server into extension.toml.

Extension integration

• Registered objectscript-lsp in extension.toml for languages objectscript_udl, objectscript_routine, xml, objectscript
• Added GitHub Actions release workflow (.github/workflows/release.yml) for objectscript-lsp that builds the binary files for the objectscript language server on a tag. This is used in the Zed extension.

Scope tree changes (scope_tree.rs)

• Conditionals (command_if, else_block, elseif_block) now create child scopes
• get_scope_for_range added to find which scope a given range belongs to
• get_scope_children returns all descendant scope IDs

Variable resolution (workspace.rs)

• Variables now stored as HashMap<String, Vec<(VariableRef, ScopeId)>> — each definition paired with its scope
• Same-scope resolution: last definition BEFORE the reference wins
• Child-scope definitions are included in resolution (a set inside an if block is visible in the parent scope)
• Public variable resolution via dependency graph: if a variable isn't defined locally, traverse callers using all_ancestors to find it

Dependency graph (dependency_tracker.rs)

• DependencyGraph stores DiGraph<MethodRef, Range> — edge weights are the range of the method call site
• all_ancestors(target) uses BFS to return callers ordered by proximity (closest first)
• add_edge(caller, callee, range) creates caller→callee edges

Oref resolution (workspace.rs, lsp.rs) — NEW

• Added get_oref_definitions — oref goto-definition did not exist before this
• Resolves method calls on oref instances (e.g. set result = obj.MethodName() navigates to the method definition from the instance tied to that oref)
• Resolves public variables accessed through orefs via the same dependency graph traversal

Class/method name goto-definition — NEW

• Goto-definition on a class name reference (e.g. in ##class(ClassName)) navigates to that class definition
• Goto-definition on a method name reference (e.g. do ..MethodName()) navigates to the method definition
• Goto-definition on a method name at its own definition navigates to the superclass implementation of that method
• Goto-definition on a class name at its own definition navigates to the superclass

Dependency graph (dependency_tracker.rs)

• all_ancestors now returns Vec<(MethodRef, Range, usize)> — includes BFS depth
• Depth tracking enables "closest ancestor wins" with same-depth peers all returned

Variable building (method.rs)

• Switched from manual AST parsing to tree-sitter query for set command discovery
• Query: (command_set (set_argument [(set_target) (set_target_list)] @settarget (expression) @value))
• This finds ALL set commands recursively, including inside conditionals

Public variable resolution (workspace.rs)

• Iterates ancestors in BFS order (closest first)
• When a match is found at depth N, continues collecting at depth N but breaks at depth N+1
• Multiple ancestors at the same depth all contribute their definitions
• Same logic applied for oref public variable resolution in find_classes_from_oref

Refactoring label change (refactor.rs)

• Extracted subroutines now use Private label