add-parserlisted

# Add a parser for a new file format remindb's `pkg/parser/` package turns raw source bytes into a slice of `*ContextNode` trees. Adding a format means routing one new extension through `ParseBytes` and emitting nodes that match the conventions every other format already follows. ## Where the format lands Five files. Skipping any one of them ships a half-wired format. | File | What changes | |---|---| | `pkg/parser/<format>.go` | New file — the parser itself | | `pkg/parser/parser.go` | Add a `case` to the `ParseBytes` switch | | `pkg/parser/<format>_test.go` | New file — table tests over fixture strings | | `pkg/parser/fuzz_test.go` | Add 2–4 `f.Add(...)` seeds to `FuzzParseBytes` | | `pkg/parser/testdata/` (optional) | Drop a sample file if tests are easier with a real fixture | ## The parser file shape Mirror `pkg/parser/yaml.go` exactly. The pattern is from `.claude/rules/go-concise.md` §4 ("Namespace prefix-sharing helpers via a struct"): an empty struct provides the namespace, a free function is the entry point, methods drop the prefix. ```go package parser import "fmt" type TomlParser struct{} func parseToml(path string, data []byte) ([]*ContextNode, error) { return TomlParser{}.parse(path, data) } func (p TomlParser) parse(path string, data []byte) ([]*ContextNode, error) { // ... format-specific decode ... if err != nil { return nil, fmt.Errorf("failed to parse: toml %s: %w", path, err) } return []*ContextNode{buildNode(path, ""