fix(docs): stale docs after v1.0.8

[ramonclaudio]

v1.0.8 shipped a bunch of renames and removals but the docs didn't follow. Went through mcp.ts, store.ts, qmd.ts, llm.ts, and collections.ts line by line and fixed everything that was wrong.

mcp-setup.md had the old tool name structured_search (now query, mcp.ts:244), wrong param name on get (path should be file, mcp.ts:367), a ghost full param that doesn't exist, and missing fromLine/maxLines. collection was a string, now it's a collections array (mcp.ts:313). Also missing the expand search type.

README.md listed 3 dead MCP tools (qmd_search, qmd_vector_search, qmd_deep_search). Only qmd_query exists now. HTTP section said "two endpoints" but POST /query was missing. Reranker section said rankAndSort() but the code uses rankAll() (llm.ts:1054). Said "Top 30" but RERANK_CANDIDATE_LIMIT = 40 (store.ts:227). Score table had "LLM 0-10 rating / score / 10" which isn't how rankAll() works. Schema listed collections and path_contexts tables that get DROP TABLE'd on init (store.ts:636-637). Env vars table was missing XDG_CONFIG_HOME and NO_COLOR.

docs/SYNTAX.md had a "q" param in the API example that doesn't exist anywhere in mcp.ts.

CLAUDE.md still had qmd context check (removed in 262c7d3), was missing 4 collection subcommands (show, update-cmd, include, exclude), and said "Qwen3" instead of qmd-query-expansion-1.7B.

Changes

• skills/qmd/references/mcp-setup.md: tool rename, param fixes, added expand type (+5/-3)
• README.md: dead tool names, missing endpoint, reranker, schema, env vars (+22/-15)
• docs/SYNTAX.md: removed ghost q param (+4/-12)
• CLAUDE.md: removed dead cmd, added missing subcommands, fixed model name (+6/-5)

Test plan

• mcp-setup.md params match mcp.ts tool schemas
• README tool list matches registerTool() calls
• README schema matches store.ts CREATE TABLE statements

[ramonclaudio]

cc: @tobi