Replace nvm with mise as Node version manager

[nnoce14]

Task

Replace nvm with mise as the version manager for Node.js in this repository.

See mise documentation for guidance: https://mise.jdx.dev/getting-started.html

Acceptance Criteria

• Remove all configurations and dependencies related to nvm.
• Add configuration for mise as the Node version manager.
• Project should use a mise.toml configuration file similar to the reference implementation in simnova/sharethrift:

# See https://mise.jdx.dev/schema/mise.json

[tools]
node = "22.22.2"
python = "3.13"

[settings]
# Automatically install tools when entering the project directory
auto_install = true

[env]
# Ensure pnpm is available (installed via corepack)
_.path = ["./node_modules/.bin"]
# Python virtual environment
_.python.venv = { path = ".venv", create = true }

• Remove .nvmrc files (if present).
• Update project documentation (e.g., README) mentioning usage of mise instead of nvm for Node.js version management.

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For further details on implementation, see the reference mise.toml and adapt settings to match the Node.js versions used by the project.