[OPDATA-3889] Ftse EA Parsing Utils

[chray-zhang]

Closes https://smartcontract-it.atlassian.net/browse/OPDATA-3889

Description

• CSV Parsing has a strict structure that it follows or expects
• Added a parser for both Russell and FTSE
• Have a factory to determine parser based on instrument
• Parser inherits from a base class

Google doc context: https://docs.google.com/document/d/1Jk7HrMddqBkBjWXx62FoIcwI8dSHbIvLsCvAhh76uV8/edit?tab=t.0

Quality Assurance

• [x ] If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant infra-k8s configuration file.
• [x ] If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant adapter-secrets configuration file or update the soak testing blacklist.
• [x ] If a new adapter was made, or a new endpoint was added, update the test-payload.json file with relevant requests.
• [ x] The branch naming follows git flow (feature/x, chore/x, release/x, hotfix/x, fix/x) or is created from Jira.
• [ x] This is related to a maximum of one Jira story or GitHub issue.
• [ x] Types are safe (avoid TypeScript/TSLint features like any and disable, instead use more specific types).
• [ x] All code changes have 100% unit and integration test coverage. If testing is not applicable or too difficult to justify doing, the reasoning should be documented explicitly in the PR.

[changeset-bot]

🦋 Changeset detected

Latest commit: d1fb425

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@chainlink/ftse-sftp-adapter	Minor

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[dskloetc]

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[chray-zhang]

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[chray-zhang]

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