docs(readme): add generic install paths and devcontainer guidance

[mconstantinescu]

Description

Add a Podman-friendly devcontainer and update README installation docs to support three paths:

• Prebuilt VSIX
• Dev Container build (no local Node.js/npm)
• Local Node.js/npm build

Also documents fallback workflow when release publishing permissions are missing.

Related Issues

Relates to install path portability and contributor onboarding improvements.

Checklist

• npm run check passes (typecheck + lint + spellcheck + knip + tests)
• Changes are covered by tests (if applicable)
• Documentation updated (if applicable)

[macko76]

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[mconstantinescu]

@mconstantinescu please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

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Contributor License Agreement

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[macko76]

lint and reformatted markdown

[macko76]

Install procedures and prerequisites updated to reflect submission

[macko76]

functionality tested across OS (MacOs / Windows) and Container tooling (Docker or Podman)

[Copilot]

Pull request overview

This PR improves contributor onboarding and installation portability by documenting multiple install workflows in the root README and introducing a Dev Container setup intended to work with Docker/Podman.

Changes:

• Updates README.md to describe three installation paths (prebuilt VSIX, Dev Container build, local build) and a fallback workflow when Release publishing permissions are missing.
• Adds a .devcontainer configuration (Dockerfile + devcontainer.json) for containerized development.

Show a summary per file

File	Description
README.md	Replaces “Quick Start” with a multi-path installation guide and improves table formatting.
.devcontainer/Dockerfile	Introduces a devcontainer image build and attempts to preinstall Playwright dependencies.
.devcontainer/devcontainer.json	Adds Dev Containers configuration with recommended extensions and postCreateCommand.

Copilot's findings

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• Files reviewed: 3/3 changed files
• Comments generated: 1

[macko76]

Addressed remaining Dockerfile feedback on this PR:\n\n- Switched base image to mcr.microsoft.com/devcontainers/typescript-node:22-bookworm\n- Kept Playwright setup on pinned CLI with install-deps only for reproducibility\n\nLatest commit: 3ff3db2 (signed/verified).\n\nPlease re-review when convenient.

[macko76]

Update on #54:\n\n- Rebased branch on latest main to remove merge conflicts\n- Updated devcontainer base image to mcr.microsoft.com/devcontainers/typescript-node:22-bookworm\n- Kept Playwright setup pinned/reproducible (
px -y playwright@1.60.0 install-deps)\n- All commits on this PR are now signed and verified\n\nCould you please take another look when you have a moment?

[macko76]

comments addressed.