Normalize cspell config and update prettier script

[coliff]

This pull request introduces several improvements to project configuration, documentation, and repository maintenance. The main changes include adding configuration files for linting, spell checking, and editor consistency, updating documentation for clarity and accuracy, and modernizing project metadata.

Repository maintenance and configuration:

• Added .github/workflows/super-linter.yml to enable automated linting of codebase using GitHub Actions and Super-Linter.
• Added .github/dependabot.yml to automate dependency updates for GitHub Actions workflows.
• Added .editorconfig to enforce consistent coding styles across different editors.
• Added .cspell.json to configure spell checking for markdown and code files, improving documentation quality.
• Removed .travis.yml as part of migration away from Travis CI, reflecting a shift to GitHub Actions for CI/CD.

Documentation updates:

• Revised README.md to clarify plugin categories, update plugin links, and remove outdated sections for improved readability.
• Updated license attribution in README.md to reference HTMLHint instead of David Dias.
• Simplified and clarified guidelines in CONTRIBUTING.md, including updated issue links and streamlined contribution instructions.

Project metadata modernization:

• Updated package.json with accurate project description, author, license, homepage, repository URL, and added scripts for formatting and spell checking.

[Copilot]

Pull request overview

This PR modernizes repository/project configuration and documentation by adding baseline tooling (Super-Linter, Dependabot, EditorConfig, cspell), removing legacy CI (Travis), and updating project metadata/docs to reflect the HTMLHint organization.

Changes:

• Add GitHub Actions Super-Linter workflow and Dependabot configuration for workflow updates.
• Add editor/spellcheck configuration files and update package.json scripts/metadata.
• Refresh README.md and CONTRIBUTING.md, and remove .travis.yml.

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
package.json	Updates metadata and adds prettier/spellcheck scripts.
README.md	Restructures contents/links and updates attribution text.
CONTRIBUTING.md	Simplifies contributing guidance and fixes issue link target.
.travis.yml	Removes Travis CI config (migration to GitHub Actions).
.gitignore	Adds ignore rules for OS/editor artifacts and lockfiles.
.github/workflows/super-linter.yml	Introduces automated linting via Super-Linter on pushes/PRs.
.github/dependabot.yml	Enables monthly GitHub Actions dependency updates.
.editorconfig	Establishes consistent whitespace/newline conventions.
.cspell.json	Adds cspell configuration for repository spellchecking.

Comments suppressed due to low confidence (1)

README.md:23

• The README links to contributing.md, but the repository file is CONTRIBUTING.md (uppercase). On case-sensitive filesystems (and on GitHub), this link will 404; update the link target to match the actual filename.

Contributions welcome! Read the [contribution guidelines](contributing.md) first.

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[Copilot]

package.json sets license to MIT, but the README's License section indicates the project is released under CC0 (badge + waiver text). These should be consistent; either update package.json to the correct SPDX identifier (e.g., CC0-1.0) or update the README/license files to match MIT.

Suggested change

	"license": "MIT",
	"license": "CC0-1.0",