adopt fluent theme for json schema from

[YingXue]

• Addressing the two bugs by using fluent theme rjsf and ripping out custom widget plugins. [BUG] Can't set Telemetry Interval less than 1 second in v0.15.2 #586 [BUG] Enum values with 0 are ignored in writable properties #449
• Utilize addtionalProperties in Json schema (as rjsf now supports nested additionalProperties rendering) to enable showing nested map types and remove custom converters. [BUG] IoT PnP: Empty string not allowed in "mapValue": { "name": "xyz", "schema": "string"} #505

One drawback is that we have to temporarily enable npm ci --force, as rjsf has not updated its fluent dependency from 7 to 8, and we have an accessibility dependency on fluent 8. Tracking the issue here: rjsf-team/react-jsonschema-form#3463

• If introducing new functionality or modified behavior, are they backed by unit tests?
• Have all unit tests passed locally? (by running npm run test command)
• Have you updated the README.md with new screenshots if significant changes have been made?
• Have you update the package version if the current version in package.json is not higher than the version released?