docs: clarify Claro v1 status and validation

docs/EDITOR_EXTENSION_PLAN.md

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+# Claro Editor and IDE Support Plan
+
+Current release: **Claro v1.18.26**
+
+Claro has an IDE metadata/helper foundation. It does not yet have a complete editor extension or LSP experience.
+
+## Ready now
+
+- `claro ide`
+- metadata JSON
+- completion list
+- diagnostics helper
+- formatter/checker commands that editor tools can call
+
+## Goal
+
+Give beginners fast, friendly feedback while they type, without requiring them to understand compiler internals.
+
+## Suggested phases
+
+1. Syntax highlighting grammar for `.claro` files.
+2. Editor snippets for common beginner patterns.
+3. On-save `claro check` diagnostics.
+4. Formatter integration.
+5. Hover help from command metadata.
+6. Code actions for common mistakes such as `PRNT` -> `SAY`.
+7. LSP server only after the metadata and diagnostics formats are stable.
+
+## Beginner safety rules
+
+- Messages should explain the fix, not just the error.
+- Suggestions should prefer modern simple syntax.
+- Editor tooling should never run network commands unless the user explicitly asks.
+- Lessons should still work from the terminal without an editor extension.
+
+See also:
+- `IDE.md`
+- `CURRENT_STATUS.md`
+- `ROADMAP.md`