Split FieldsSchemaEditor into smaller components

[saidake]

What

Refactors the value decoder FieldsSchemaEditor into smaller components.

• Extracted field editing UI into FieldRow (including size-source handling)
• Extracted repeat-block chrome into RepeatBlockEditor
• Kept FieldsSchemaEditor as the orchestration layer for add/remove/reorder and nested editing

Increase the timeout of a test in redisinsight/ui/src/pages/browser/BrowserPage.test.tsx, as I encountered a UI CI timeout error:

FAIL redisinsight/ui/src/pages/browser/BrowserPage.test.tsx (72.576 s)
  ● KeyDetailsHeader › Verify that user cannot rename key name with unprintable characters and check tooltip

    thrown: "Exceeded timeout of 5000 ms for a test.
    Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."

      184 |   })
      185 |
    > 186 |   it('Verify that user cannot rename key name with unprintable characters and check tooltip', async () => {
          |   ^
      187 |     const { queryByTestId } = render(<BrowserPage />)
      188 |
      189 |     const afterRenderActions = [...store.getActions()]

      at it (redisinsight/ui/src/pages/browser/BrowserPage.test.tsx:186:3)
      at Object.describe (redisinsight/ui/src/pages/browser/BrowserPage.test.tsx:162:1)

Testing

The Value Decoder field schema continues to work as before:

---

Note

Low Risk
UI-only refactor of the value decoder schema editor with extracted pure mutation helpers and new unit tests; no API or security surface changes.

Overview
Refactors the value decoder FieldsSchemaEditor by pulling UI and state logic out of one large file while keeping behavior the same.

Field editing moves to FieldRow and FieldSizeEditor (name, type, fixed vs custom size, size-from-field refs). Repeat blocks use RepeatBlockEditor, which renders nested schema editing via children instead of calling FieldsSchemaEditor from inside the repeat component. Add/remove/reorder and field/repeat updates go through useSchemaEditor and exported pure apply* helpers (covered by useSchemaEditor.spec.ts).

toNumericOptions (numeric ref select labels, including duplicate-name disambiguation) is centralized in schemaUtils with unit tests. BrowserPage.test.tsx gets a 10s timeout on one tooltip test.

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[pawelangelow]

Overall looks good - nice clean split, and simple is better IMO. The one thing I'd like before we merge is tests for the new components and the extracted logic; that's really the win from isolating them like this.

[saidake]

hi @pawelangelow
The PR has been updated, please take a look.