DF-19335 add known issues section to readme generator

[mmcallister-cll]

Closes #DF-19335

Description

Adds known issues section to readme generator based on presence of <ea>/docs/known-issues.md file.
Adds known issues section to readme for tp and icap adapters.

Changes

• Update readme generator.ts with known issues section
• add ability to read .md files
• specific known issues files for tp and icap adapters

Steps to Test

1. generate readme without known issues to test regression
2. add file under a given adapter
3. Verify presence of known issues section

Quality Assurance

• 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.
• 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.
• If a new adapter was made, or a new endpoint was added, update the test-payload.json file with relevant requests.
• The branch naming follows git flow (feature/x, chore/x, release/x, hotfix/x, fix/x) or is created from Jira.
• This is related to a maximum of one Jira story or GitHub issue.
• Types are safe (avoid TypeScript/TSLint features like any and disable, instead use more specific types).
• 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: 48ee53e

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

This PR includes changesets to release 3 packages

Name	Type
@chainlink/icap-adapter	Patch
@chainlink/tp-adapter	Patch
@chainlink/ea-scripts	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[austinborn]

Changeset for TP and ICAP? I know it's not a functional change but if it's part of the package IMO it's worth versioning.