refactor: Introduce explicit-member-accessibility lint rule

[ivov]

Follow-up to: #12310 (comment)

[codecov]

Codecov Report

Attention: Patch coverage is 56.81818% with 19 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...source-control/source-control-import.service.ee.ts	8.33%	11 Missing ⚠️
...mory/MemoryBufferWindow/MemoryBufferWindow.node.ts	0.00%	2 Missing ⚠️
...es/vector_store/shared/MemoryVectorStoreManager.ts	66.66%	1 Missing ⚠️
...c/databases/repositories/test-run.repository.ee.ts	75.00%	1 Missing ⚠️
...source-control/source-control-export.service.ee.ts	0.00%	1 Missing ⚠️
...e-control/source-control-preferences.service.ee.ts	66.66%	1 Missing ⚠️
...nments/source-control/source-control.service.ee.ts	0.00%	1 Missing ⚠️
...es/cli/src/runners/errors/task-runner-oom-error.ts	0.00%	1 Missing ⚠️

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[github-actions]

✅ All Cypress E2E specs passed

[cypress]

n8n    Run #8430

Run Properties:   Passed #8430  •  d0ce3af621: 🌳 🖥️ browsers:node18.12.0-chrome107 🤖 ivov 🗃️ e2e/*

Project	n8n
Branch Review	explicit-member-accessibility
Run status	Passed #8430
Run duration	04m 41s
Commit	d0ce3af621: 🌳 🖥️ browsers:node18.12.0-chrome107 🤖 ivov 🗃️ e2e/*
Committer	Iván Ovejero
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	3
Pending	0
Skipped	0
Passing	480
View all changes introduced in this branch ↗︎