chore: add changeset for Go language support

Author: prosdev

.changeset/go-language-support.md

@@ -0,0 +1,33 @@
+---
+"@lytics/dev-agent": minor
+"@lytics/dev-agent-core": minor
+"@lytics/dev-agent-cli": minor
+"@lytics/dev-agent-subagents": minor
+---
+
+feat: Go language support
+
+Add comprehensive Go language support to dev-agent:
+
+**Go Scanner**
+- Tree-sitter WASM infrastructure (reusable for Python/Rust later)
+- Extract functions, methods, structs, interfaces, types, constants
+- Method receivers with pointer detection
+- Go 1.18+ generics support
+- Go doc comment extraction
+- Exported symbol detection (capital letter convention)
+- Generated file skipping (*.pb.go, *.gen.go, etc.)
+- 90%+ test coverage
+
+**Indexer Logging**
+- Add `--verbose` flag to `dev index`, `dev git index`, `dev gh index`
+- Progress spinner shows actual counts: `Embedding 4480/49151 documents (9%)`
+- Structured logging with kero logger
+
+**Go-Specific Exclusions**
+- Protobuf: `*.pb.go`, `*.pb.gw.go`
+- Generated: `*.gen.go`, `*_gen.go`
+- Mocks: `mock_*.go`, `mocks/`
+- Test fixtures: `testdata/`
+
+Tested on large Go codebase (~4k files, 49k documents).