perf: #5 refactor config props

[miquelbeltran]

perf: #5 refactor config props

Description 📝

• Purpose: Following the conversation in Support config file for arguments like the app-id #5 (comment) this PR refactors config props into individual parameters so they are easier to use.

The main idea of a "config prop" is to facilitate parsing either from arguments or env variables (and in the future from a config dot file as well).

• Approach: The ConfigProps class is now converted into the ConfigProp class, and static consts for each of the config properties (app id, token and api-key) are now individual ConfigProp const instances.

You can obtain the value (either from args or env-vars) calling like:

ConfigProp.token.from(arguments);

Type of change

• Refactor

Updates

• Refactored ConfigProps and Environment to support this change.
• Refactored all commands that used ConfigProps originally

Test plan 🧪

Tested some commands to verify everything works as before:

➜  raygun-cli git:(config-props-optional) RAYGUN_API_KEY=123 RAYGUN_TOKEN=123 dart run bin/raygun_cli.dart deployments --version=1.2.3 --verbose
token: 123
api-key: 123
version: 1.2.3
owner-name: null
email-address: null
comment: null
scm-identifier: null
scm-type: null
....

Also updated unit tests.

Author to check 👓

• Project and all contained modules builds successfully
• Self-/dev-tested
• Unit/UI/Automation/Integration tests provided where applicable
• Code is written to standards
• Appropriate documentation written (code comments, internal docs)

Reviewer to check ✔️

• Project and all contained modules builds successfully
• Change has been dev-/reviewer-tested, where possible
• Unit/UI/Automation/Integration tests provided where applicable
• Code is written to standards
• Appropriate documentation written (code comments, internal docs)

[TheRealAgentK]

LGTM

[TheRealAgentK]

Merging before #8, so that I can make the required adjustments.