feat(schematics): options for convert-tslint-to-eslint

[JamesHenry]

Resolve #395, resolves #307, resolves #380

[nx-cloud]

Nx Cloud Report

CI ran the following commands for commit 87b7076. Click to see the status, the terminal output, and the build insights.

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Status	Command
	nx run-many --target=build --all --parallel
	nx run-many --target=check-configs --all --parallel
	nx run-many --target=test --all --parallel
	nx run-many --target=typecheck --all --parallel

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[codecov]

Codecov Report

Merging #419 (5e6bc5b) into master (26ded89) will decrease coverage by 3.75%.
The diff coverage is 39.18%.

@@            Coverage Diff             @@
##           master     #419      +/-   ##
==========================================
- Coverage   69.15%   65.40%   -3.76%     
==========================================
  Files          13       14       +1     
  Lines         509      581      +72     
  Branches       92      110      +18     
==========================================
+ Hits          352      380      +28     
- Misses        119      153      +34     
- Partials       38       48      +10     

Impacted Files	Coverage Δ
...s/schematics/src/convert-tslint-to-eslint/utils.ts	60.65% <11.11%> (-20.74%)	⬇️
...s/schematics/src/convert-tslint-to-eslint/index.ts	46.19% <18.51%> (-4.75%)	⬇️
packages/schematics/src/utils.ts	73.04% <57.14%> (-2.21%)	⬇️
...matics/src/migrations/update-4-0-0/update-4-0-0.ts	93.33% <93.33%> (ø)