Add TypeScript config from internal repo and fix some errors

[codykaup]

This adds most of the tsconfig.json from our internal repo with one exception: strict: true. Therefore, this is mostly fixing random errors that appear when enabling strict mode. There were 273 errors in 60 files when I first turned this on. I fixed a little more than half with this PR and figured that was a good place to stop. Unfortunately, there's 109 errors in 32 files remaining after this.

Note: I focused on errors that should have zero impact on the flow of the CLI. There are some other changes we'll have to make that are a bit riskier so I left those for future me.

📦 Published PR as canary version: 11.11.1--canary.1070.11150810838.0

✨ Test out this PR locally via:

npm install [email protected]
# or 
yarn add [email protected]

[github-actions]

📦 Package Size: 4644 KB
⚠️ Compared to main: +4 KB ab380a0 (4640 KB)

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.08% (target: -1.00%)	❌ 59.02% (target: 80.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (ab380a0)	8460	4557	53.87%
Head commit (54311d9)	8485 (+25)	4564 (+7)	53.79% (-0.08%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1070)	122	72	59.02%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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