chore: replace Super-Linter to streamline ci-cd

[mobilemind]

chore: replace Super-Linter to streamline ci-cd

[Copilot]

Pull request overview

This PR streamlines the CI/CD linting setup by removing Super-Linter and replacing it with explicit, repo-owned lint/validation steps, while also relocating linter configuration into root-level files.

Changes:

• Replaces Super-Linter in the GitHub Actions linter workflow with discrete steps (ESLint, markdownlint-cli2, yamllint, actionlint, JSON/JSONC validation).
• Updates preflight and documentation to use the new root-level lint config locations and tooling.
• Adds root-level .yamllint.yml and .markdownlint.json configs, plus an actionlint config under .github/.

Reviewed changes

Copilot reviewed 6 out of 10 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
preflight	Updates local preflight lint commands to match the new tooling/layout (yamllint, markdownlint-cli2, eslint).
package.json	Bumps ESLint, adds markdownlint-cli2, and introduces a markdown lint script.
package-lock.json	Locks dependency updates corresponding to ESLint bump and markdownlint-cli2 addition.
eslint.config.js	Adjusts ESLint targeting after moving/removing .github/linters JS configs.
SECURITY.md	Updates documentation references for the ESLint config location.
.yamllint.yml	Introduces repo yamllint rules/ignore patterns.
.markdownlint.json	Introduces markdownlint rule customizations (e.g., allowed fenced code languages).
.github/workflows/linter.yml	Replaces Super-Linter with explicit lint/validation steps.
.github/copilot-instructions.md	Updates contributor instructions to reflect new lint config locations/tools.
.github/actionlint.yaml	Adds actionlint configuration file.

[Copilot]

Preflight runs ESLint only on scripts/*.js and src/*.ts, but CI linting runs npx eslint .. This can let config-file lint failures (e.g. eslint.config.js) slip through locally; consider aligning preflight with CI (or clearly documenting the intended difference).

[Copilot]

Markdown linting is run via markdownlint-cli2, but no explicit configuration is provided. Since this PR adds .markdownlint.json with custom rules, consider ensuring the workflow actually loads that config (otherwise the new rules may not be enforced).

Suggested change

	run: npx markdownlint-cli2 "**/*.md" "#node_modules" "#dist"
	run: npx markdownlint-cli2 -c .github/linters/.markdownlint.json "**/*.md" "#node_modules" "#dist"

[Copilot]

YAML linting installs an unpinned yamllint version and runs it without specifying the repo config. For reproducible CI and to ensure .yamllint.yml rules/ignores are applied, consider pinning the yamllint version and invoking it with -c .yamllint.yml.

Suggested change

	pip install --quiet yamllint
	yamllint .
	pip install --quiet yamllint==1.35.1
	yamllint -c .github/linters/.yaml-lint.yml .