v0.11.0

Added

• ExAST.Index.plan/1, ExAST.Index.terms/1, and structural index plan
  structs for building external candidate indexes while keeping ExAST as the
  semantic verifier.
• ExAST.Index.Terms.from_source/1, from_ast/1, from_pattern/1, and term
  signal classification helpers.
• ExAST.Selector.requires_source?/1, requires_comments?/1, find_all/3,
  and match?/3 for source-aware selector planning and verification.
• ExAST.Comments.extract/1 and ExAST.Comments.text/1 for comment extraction
  with source position metadata.
• ExAST.Symbols.definitions/1 and ExAST.Symbols.references/1 for syntactic
  definition/reference extraction.
• Symbol helpers for stable qualified names and optional BEAM-native MFA tuples:
  ExAST.Symbols.qualified_name/1, mfa/1, and matches?/2.
• Indexing and code intelligence guide.