docs(config): add descriptions to all configuration variables and tests

[onyedikachi-david]

Closes #40

/claim #40

Changes proposed

• Added descriptions to all configuration variables in OpalClientConfig
• Added descriptions to all configuration variables in OpalServerConfig
• Added descriptions to all configuration variables in OpalCommonConfig
• Created a test to ensure all configuration variables have descriptions

Check List (Check all the applicable boxes)

• [x] I sign off on contributing this submission to open-source
• [x] My code follows the code style of this project.
• [ ] My change requires changes to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] All new and existing tests passed.
• [x] This PR does not contain plagiarised content.
• [x] The title of my pull request is a short description of the requested changes.

[netlify[bot]]

✅ Deploy Preview for opal-docs canceled.

Name	Link
🔨 Latest commit	f38be075a4f4d6e4264c3e29d6d8cfcc2816b220
🔍 Latest deploy log	https://app.netlify.com/sites/opal-docs/deploys/670cb6503eea510008cf6b54

[onyedikachi-david]

The PR is ready for review @gemanor

[onyedikachi-david]

It is a good start, but the descriptions need to be much more descriptive. I left two examples (but there are more). Please fix them, and commit again.

Done.

[onyedikachi-david]

@gemanor Please review.

[onyedikachi-david]

Hi @gemanor, I don't know if you have got time to review this.

[onyedikachi-david]

Hi @gemanor, I don't know if you have got time to review this.

[onyedikachi-david]

@iwphonedo, I thought it's closed. Even though I open a PR first and my re-review request was pending when the other PR was opened. Should I reopen?

[izzywdev]

@onyedikachi-david send like another PR was already merged for this. Sorry I didn't notice prior to my review. Best

[onyedikachi-david]

Okay