Add url validation options + regex literal syntax

[Copilot]

URL validation options

• Add noTrailingSlash and matches options to url data type
• Support regex("pattern") wrapper in matches option (runtime + vscode paths)
• Tests for regex() wrapper in matches option (url and string)

Regex literal syntax (/pattern/flags)

• New ParsedEnvSpecRegexLiteral AST class in env-spec-parser
• RegexLiteral grammar rule, wired into all value positions (config values, function args, decorator values)
• Regex literals handled natively in simplifiedValues, convertParsedValueToResolvers, and expand
• VSCode diagnostics updated to recognize /pattern/flags in matches option and isDynamicValue
• regex() function marked as deprecated in intellisense, with guidance to use literal syntax
• Parser tests: literals as values, in function args, in key=value args, toString roundtrip
• Resolver tests: regex literal match, regex literal with flags, regex literal as top-level value error
• Changeset added

Example usage

# before (still works, but deprecated)
ITEM=remap($ENV, regex("^dev.*"), "http://localhost", regex("^prod.*"), "https://prod.example.com")
# @type=url(matches=regex("^https://api\."))

# after
ITEM=remap($ENV, /^dev.*/, "http://localhost", /^prod.*/, "https://prod.example.com")
# @type=url(matches=/^https:\/\/api\./)

[changeset-bot]

🦋 Changeset detected

Latest commit: d54c0ee

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 20 packages

Name	Type
varlock
env-spec-language	Patch
@env-spec/parser	Minor
@varlock/astro-integration	Major
@varlock/cloudflare-integration	Major
@varlock/expo-integration	Major
@varlock/nextjs-integration	Major
@varlock/vite-integration	Major
@varlock/1password-plugin	Major
@varlock/aws-secrets-plugin	Major
@varlock/azure-key-vault-plugin	Major
@varlock/bitwarden-plugin	Major
@varlock/dashlane-plugin	Major
@varlock/google-secret-manager-plugin	Major
@varlock/hashicorp-vault-plugin	Major
@varlock/infisical-plugin	Major
@varlock/keepass-plugin	Major
@varlock/pass-plugin	Major
@varlock/passbolt-plugin	Major
@varlock/proton-pass-plugin	Major

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commit: d54c0ee