tables and views commands accept optional table/view names (#478)

[ChrisJr404]

Adds an optional list of table (or view) names to the tables and views commands so you can restrict the output to just the tables you care about, rather than always listing everything. This addresses #478.

The motivating case from the issue is --counts against a database that contains one very large table: counting every table is expensive, so being able to say sqlite-utils tables data.db small1 small2 --counts and skip the big one is useful.

sqlite-utils tables mydb.db dogs cats --counts
[{"table": "dogs", "count": 12},
 {"table": "cats", "count": 332}]

Names are output in the order they are passed. Following the suggestion in the issue that this should error rather than fail silently, an unknown name raises a ClickException and exits non-zero, so the exit code can be used to confirm that a set of expected tables (or views) exists:

$ sqlite-utils tables mydb.db dogs nope
Error: The following table does not exist: nope
$ echo $?
1

The views command shares the tables callback, so it picks up the same behaviour against view names.

The change is backwards compatible: with no names passed, both commands behave exactly as before.

I added tests covering filtering, argument-order preservation, combining names with --counts, and the single/multiple missing-name error messages for both commands. The docs (docs/cli.rst) and the cog-generated docs/cli-reference.rst are updated. black, flake8, mypy, pyright and cog --check all pass, and the full tests/test_cli.py suite is green.

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📚 Documentation preview 📚: https://sqlite-utils--845.org.readthedocs.build/en/845/