feature(cSDK): ConfigurationForm and test example

[fivetran-anushkaparashar]

Jira ticket

Closes https://fivetran.atlassian.net/browse/RD-1063108

Description of Change

Added an example for connector sdk that defines configuration form and tests

Testing

Checklist

Some tips and links to help validate your PR:

• Tested the connector with fivetran debug command.
• Added/Updated example-specific README.md file, see the README template for the required structure and guidelines.
• Followed Python Coding Standards, refer here

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[Copilot]

Pull request overview

Adds a new quickstart example connector demonstrating how to define a ConfigurationForm (with multiple field types) and register a “Test Connection” setup test for Connector SDK users.

Changes:

• Introduces configuration_form() with fields and a connection_test() setup test.
• Adds a paginated sync example in update() that fetches /posts and checkpoints an offset cursor.
• Adds an example configuration.json for local debugging.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 9 comments.

File	Description
examples/quickstart_examples/configuration_form/connector.py	New example connector showcasing configuration form + test connection + paginated sync loop
examples/quickstart_examples/configuration_form/configuration.json	Adds a sample config for the new example

[fivetran-dejantucakov]

@fivetran-anushkaparashar Approved with. minor formatting updates

[fivetran-JenasVimal]

LGMT

[fivetran-dejantucakov]

@fivetran-anushkaparashar LGTM

[fivetran-anushkaparashar]

@fivetran-sahilkhirwal @fivetran-dejantucakov Can you please re-approve? Your review was dismissed by a latest small change that I pushed.