Prepare v0.13.2 release

Prepare v0.13.1 release

Prepare v0.13.0 release

Merge pull request #9 from golangsnmp/dependabot/github_actions/actio…

…ns/cache-6

Bump actions/cache from 5 to 6

Replace IdentifierAt/IsIdentByte with TokenAt, remove SymbolReferences

- Replace byte-scanning heuristic (IdentifierAt, IsIdentByte) with
  TokenAt that walks the CST token stream for the token at a given
  offset, correctly excluding comments and strings
- Remove SymbolReferences, SymbolRef, RefKind (unused, duplicated by
  LSP's own semantic reference collection)
- Update changelog to reflect the actual API surface

Bump version to 0.10.0

Bump version to 0.9.0

Drop golangci-lint version pin from CI

Make --permissive relax diagnostic failure threshold

--permissive now sets both resolver strictness (tier-3 global fallbacks)
and FailAt = SeverityFatal, so vendor MIB sets with spec violations
don't fail on non-fatal diagnostics.

- Add shared addStrictnessFlags/strictnessOpts helpers in main.go
- Apply to load, normalize, and dump commands
- Replace dump --strictness with --strict/--permissive for consistency
- Document the distinction between ResolverStrictness and DiagnosticConfig
  in API docs (gomib.go, types/enums.go, types/diagnostic.go)

Update README and add tokens example for post-v0.6.0 APIs

- Add tokenization section with token package usage
- Add Symbol, module introspection, AllSymbols, ScanModuleNames docs
- Add Node.Description/Reference and normalize CLI command
- Add examples/tokens showing inline MIB tokenization