envFile parser: support slash-delimited key names (Consul-style variables)

[ANPewansmith]

Problem

parseEnvLine uses /^\s*(_*[a-zA-Z]\w*)\s*=\s*(.*?)?\s*$/ to match env var names. \w only allows [A-Za-z0-9_], so keys containing / (e.g. globals/my_storage_dir=/some/path) are silently dropped — the line matches nothing and is discarded without error.

This affects users whose services use slash-namespaced config keys, a common pattern with Consul (used widely in enterprise deployments). The variables appear in the envFile but are silently ignored, when overriding Consul variables for local development this is extremely difficult to diagnose.

Fix

Change the key character class from \w* to [\w/]* to allow / in key names.

Notes

• The env dict in launch.json configs already supports these keys without restriction so this aligns envFile behaviour with it
• No change to value parsing

[rchiodo]

Thanks for the PR

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