[feat][Remote objects] Edit a connection (for pg) (#5210)

## Context
#4774 

## How was it tested
Locally

## In further PRs
- Update connection status upon page change
- Adapt Info banner to dark mode
- placeholders for form

packages/twenty-front/src/modules/settings/integrations/database-connection/utils/editDatabaseConnection.ts

@@ -0,0 +1,75 @@
+import { identity, isEmpty, pickBy } from 'lodash';
+import { z } from 'zod';
+
+import { settingsIntegrationPostgreSQLConnectionFormSchema } from '@/settings/integrations/database-connection/components/SettingsIntegrationDatabaseConnectionForm';
+import { RemoteServer } from '~/generated-metadata/graphql';
+
+export const getEditionSchemaForForm = (databaseKey: string) => {
+  switch (databaseKey) {
+    case 'postgresql':
+      return settingsIntegrationPostgreSQLConnectionFormSchema.extend({
+        password: z.string().optional(),
+      });
+    default:
+      throw new Error(`No schema found for database key: ${databaseKey}`);
+  }
+};
+
+export const getFormDefaultValuesFromConnection = ({
+  databaseKey,
+  connection,
+}: {
+  databaseKey: string;
+  connection: RemoteServer;
+}) => {
+  switch (databaseKey) {
+    case 'postgresql':
+      return {
+        dbname: connection.foreignDataWrapperOptions.dbname,
+        host: connection.foreignDataWrapperOptions.host,
+        port: connection.foreignDataWrapperOptions.port,
+        username: connection.userMappingOptions?.username || undefined,
+        schema: connection.schema || undefined,
+        password: '',
+      };
+    default:
+      throw new Error(
+        `No default form values for database key: ${databaseKey}`,
+      );
+  }
+};
+
+export const formatValuesForUpdate = ({
+  databaseKey,
+  formValues,
+}: {
+  databaseKey: string;
+  formValues: any;
+}) => {
+  switch (databaseKey) {
+    case 'postgresql': {
+      const formattedValues = {
+        userMappingOptions: pickBy(
+          {
+            username: formValues.username,
+            password: formValues.password,
+          },
+          identity,
+        ),
+        foreignDataWrapperOptions: pickBy(
+          {
+            dbname: formValues.dbname,
+            host: formValues.host,
+            port: formValues.port,
+          },
+          identity,
+        ),
+        schema: formValues.schema,
+      };
+
+      return pickBy(formattedValues, (obj) => !isEmpty(obj));
+    }
+    default:
+      throw new Error(`Cannot format values for database key: ${databaseKey}`);
+  }
+};