feat: SQL Catalog - namespaces (apache#534)

* feat: SQL Catalog - namespaces

Signed-off-by: callum-ryan <[email protected]>

* feat: use transaction for updates and creates

Signed-off-by: callum-ryan <[email protected]>

* fix: pull out query param builder to fn

Signed-off-by: callum-ryan <[email protected]>

* feat: add drop and tests

Signed-off-by: callum-ryan <[email protected]>

* fix: String to str, remove pub and optimise query builder

Signed-off-by: callum-ryan <[email protected]>

* fix: nested match, remove ok()

Signed-off-by: callum-ryan <[email protected]>

* fix: remove pub, add set, add comments

Signed-off-by: callum-ryan <[email protected]>

* fix: refactor list_namespaces slightly

Signed-off-by: callum-ryan <[email protected]>

* fix: add default properties to all new namespaces

Signed-off-by: callum-ryan <[email protected]>

* fix: remove check for nested namespace

Signed-off-by: callum-ryan <[email protected]>

* chore: add more comments to the CatalogConfig to explain bind styles

Signed-off-by: callum-ryan <[email protected]>

* fix: edit test for nested namespaces

Signed-off-by: callum-ryan <[email protected]>

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Signed-off-by: callum-ryan <[email protected]>