feat: dashboard UI for environment variables management (#4452)

* feat: add environment variables db schema and queries

* fix db query

* feat: add SecretsConfig proto for encrypted env vars

* [autofix.ci] apply automated fixes

* feat: dashboard UI for environment variables management

* fix comment and rename file

* fix file export name

* Remove unnecessary comments from add-env-vars

* add toasts for environment variable operations

* [autofix.ci] apply automated fixes

* fix: add try/catch error handling to env var mutations

* unfmt file

* [autofix.ci] apply automated fixes

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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Andreas Thomas <[email protected]>

Author: 3 people