feat(import): import connections from DataGrip

[datlechin]

Adds DataGrip to the connection import flow (alongside TablePlus, Sequel Ace, DBeaver, Beekeeper Studio).

What it does

• Reads DataGrip's dataSources.xml / dataSources.local.xml and parses each data source, including the JDBC connection string, into a TablePro connection.
• Recovers passwords from where DataGrip stores them:
  • the macOS Keychain (service IntelliJ Platform DB — <uuid>), and
  • the encrypted c.kdbx KeePass store DataGrip uses when the OS keychain isn't the chosen provider.
• The source app does not need to be running.

Pieces

• DataGripImporter — registered in ForeignAppImporterRegistry.
• DataGrip/DataGripDataSourceParser — parses the data-source XML.
• DataGrip/JDBCConnectionString — parses jdbc: URLs into host/port/db/params.
• JetBrains/JetBrainsCredentialStore — locates and reads the credential store.
• JetBrains/KdbxDatabase + KdbxInnerStreamCipher — decrypts the KeePass c.kdbx file (AES-KDF, AES-CBC, Salsa20 inner stream) using CommonCrypto.

Tests

DataGripImporterTests, JDBCConnectionStringTests, JetBrainsCredentialStoreTests, KdbxDatabaseTests, KdbxInnerStreamCipherTests, plus a KdbxTestFixture.

Docs: connection-sharing.mdx updated with the DataGrip row.

CHANGELOG entry intentionally omitted here (to be added under [Unreleased]).