Restructure queries config into include/exclude lists

[iamralch]

Summary

⚠️ Breaking change. Restructures options.queries from a flat list of opt-in query names into an object with include/exclude lists, mirroring the options.tables shape from #49.

# before
options:
  queries:
    - "CopyUsers"

# after
options:
  queries:
    include:
      - "CopyUsers"   # add an opt-in query on top of the defaults
    exclude:
      - "DeleteUser"  # drop a default you don't want

Semantics (additive)

Generated set = (defaults ∪ include) − exclude.

include	exclude	Result
empty	empty	the default query set (unchanged behavior)
set	empty	defaults plus the included opt-in queries
empty	set	defaults minus the excluded queries
set	set	(defaults + include) − exclude; exclude wins

include adds opt-in queries on top of the default set (it does not replace it), so adding one query never drops the defaults. exclude removes queries — including defaults like DeleteUser — and always takes precedence.

New capability

queries.exclude lets you drop an unwanted default query for the first time (e.g. DeleteUser).

Implementation notes

• CodegenOptions.Queries is now QueryOptions{Include, Exclude}; GetQueriesSet → GetQueryIncludeSet / GetQueryExcludeSet.
• The template's previously unconditional Insert/ExecInsert/BatchInsert/BatchExecInsert and base List are now gated as defaults, so they honor exclude too. All gating funnels through one predicate: should_generate $ $query_name $isDefault = (isDefault || included) && !excluded.
• The legacy flat-list form no longer parses (clean break).

Migration

Move existing queries: [...] entries under queries.include.

Validation

• go build ./..., go test ./..., nix build .#default
• Manually generated against the test catalog: default mode emits all 15 defaults; include: [CopyUsers] + exclude: [DeleteUser] adds CopyUsers and drops only DeleteUser while keeping every other default.

[github-actions]

Code Metrics Report

Coverage	Test Execution Time
84.5%	46s

Code coverage of files in pull request scope (81.9%)

Files	Coverage
internal/sqlc/config.go	95.5%
internal/sqlc/generator.go	74.0%

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Reported by octocov