chore(psl): unhide the typedSql preview feature (#5836)

## What

Moves the `TypedSql` preview feature from the **hidden** set to the
**active** set in `psl-core`'s feature classification
(`psl/psl-core/src/common/preview_features.rs`).

This is a **visibility-only change — no behavior changes**. `typedSql`
was already a valid, fully functional preview feature when enabled
explicitly in a schema; being hidden only meant it was excluded from
tooling surfaces (autocomplete in language tools) and from the "Expected
one of: ..." list in validation error messages. After this change it
appears in both.

The two tests that embed the rendered list of visible preview features
(`psl/psl/tests/config/generators.rs` and
`psl/psl/tests/validation/preview_features/native_full_text_search_postgres/mysql.prisma`)
gain `typedSql` in their expected output. No other test or snapshot in
the repository pins the classification (verified by sweeping for the
rendered list and for `TypedSql` references).

## Why now

Prisma ORM's agent-native documentation work recommends TypedSQL as the
escape hatch for several known pitfalls (e.g. full-text search on
PostgreSQL), but neither users nor AI agents can discover a hidden flag:
it never shows up in autocomplete or in the valid-feature listings that
errors print. Making the feature visible closes that discoverability
gap.

## What stays as is

- `reactNative` remains hidden.
- GA/stabilization of `typedSql` is explicitly out of scope — that would
make `$queryRawTyped` generation unconditional and is a separate
decision with its own compatibility questions.

## Validation

- `CLICOLOR_FORCE=1 cargo test -p psl --features all` — 1,297 tests
green (`CLICOLOR_FORCE` matches the CI unit-test environment; the
expect-test snapshots embed ANSI colors).
- `cargo test -p psl-core --all-features` — green.
- `cargo fmt --check -p psl-core` — clean.
- CI (`make test-unit`, workspace-wide with `--all-features`) is the
authoritative surface for the remaining crates; a repository-wide sweep
found no other snapshot embedding the visible-features list.

---------

Signed-off-by: Alexey Orlenko's AI Agent <robot@aqrln.net>

Author: tensordreams

psl/psl-core/src/common/preview_features.rs

@@ -164,6 +164,7 @@ impl<'a> FeatureMapWithProvider<'a> {
                  | SchemaEngineDriverAdapters
                  | ShardKeys
                  | StrictUndefinedChecks
+                 | TypedSql
                  | Views
             }),
             native: HashMap::from([
@@ -231,7 +232,7 @@ impl<'a> FeatureMapWithProvider<'a> {
                 | TransactionApi
                 | UncheckedScalarInputs
             }),
-            hidden: enumflags2::make_bitflags!(PreviewFeature::{ReactNative | TypedSql}),
+            hidden: enumflags2::make_bitflags!(PreviewFeature::ReactNative),
         };
 
         Self {

psl/psl/tests/config/generators.rs

@@ -256,7 +256,7 @@ fn nice_error_for_unknown_generator_preview_feature() {
         .unwrap_err();
 
     let expectation = expect![[r#"
-        [1;91merror[0m: [1mThe preview feature "foo" is not known. Expected one of: nativeDistinct, partialIndexes, postgresqlExtensions, relationJoins, schemaEngineDriverAdapters, shardKeys, strictUndefinedChecks, views[0m
+        [1;91merror[0m: [1mThe preview feature "foo" is not known. Expected one of: nativeDistinct, partialIndexes, postgresqlExtensions, relationJoins, schemaEngineDriverAdapters, shardKeys, strictUndefinedChecks, typedSql, views[0m
           -->  schema.prisma:3
            | 
          2 |   provider = "prisma-client"

psl/psl/tests/validation/preview_features/native_full_text_search_postgres/mysql.prisma

@@ -13,7 +13,7 @@ model Blog {
   title   String
   @@fulltext([content, title])
 }
-// [1;91merror[0m: [1mThe preview feature "fullTextSearchPostgres" is not known. Expected one of: nativeDistinct, partialIndexes, postgresqlExtensions, relationJoins, schemaEngineDriverAdapters, shardKeys, strictUndefinedChecks, views[0m
+// [1;91merror[0m: [1mThe preview feature "fullTextSearchPostgres" is not known. Expected one of: nativeDistinct, partialIndexes, postgresqlExtensions, relationJoins, schemaEngineDriverAdapters, shardKeys, strictUndefinedChecks, typedSql, views[0m
 //   -->  schema.prisma:3
 //    | 
 //  2 |   provider        = "prisma-client"