Analyze (explain) To Do

[tailhook]

1. [ ] Fix correlation between attributes and computables in edgedb
2. [ ] Provide fine-grained (\expand) output as nice as coarse-grained (i.e look like #1027)
3. [ ] Options for `\analyze
4. [ ] \analyze in Repl must work without query
5. [ ] Debug output (which is a full, unoptimized postgres' tree) should also be formatted similarly to fine-grained output
6. [ ] Analyze with query parameters