SNOW-2111092 TypeScript Support

[sfc-gh-rsavenok]

Description

This PR implements TypeScript support, allowing us to write new code in TypeScript and start the migration of old files.

• The new /dist folder will contain compiled JS code. Customers will start using /dist/index.js as an entry point.
• ts files can be imported into js files
• js files can be imported into ts files
• Added migration playbook to README.md

New devDependencies

• @types/** - these are *.d.ts files for libraries we use
• ts-node - used by mocha to run tests with typescript build pipeline

Ensuring that compiled code works as expected

• Mocha will run with ts-node, which will compile every test file before executing and ensure similar behavior to compiled code
• if typescript has errors, npm pack would fail and would prevent us from publishing a broken build
• on top of that, we have performance tests in monorepo, that are using snowflake-sdk package directly, so they will crush if our compiled code can't execute

Security Review

https://github.com/snowflakedb/security_reviews/pull/6846

Checklist

• Format code according to the existing code style (run npm run lint:check -- CHANGED_FILES and fix problems in changed code)
• Create tests which fail without the change (if possible)
• Make all tests (unit and integration) pass (npm run test:unit and npm run test:integration)
• Extend the types in index.d.ts file (if necessary)
• Extend the README / documentation and ensure is properly displayed (if necessary)
• Provide JIRA issue id (if possible) or GitHub issue id in commit message

[sfc-gh-snowflakedb-snyk-sa]

🎉 Snyk checks have passed. No issues have been found so far.

✅ security/snyk check is complete. No issues have been found. (View Details)

✅ license/snyk check is complete. No issues have been found. (View Details)

[codecov]

Codecov Report

Attention: Patch coverage is 96.70330% with 3 lines in your changes missing coverage. Please review.

Project coverage is 89.38%. Comparing base (a9174fb) to head (2d0c532).

Files with missing lines	Patch %	Lines
lib/util.ts	97.53%	1 Missing and 1 partial ⚠️
lib/snowflake.ts	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1080      +/-   ##
==========================================
+ Coverage   89.21%   89.38%   +0.16%     
==========================================
  Files          76       76              
  Lines        7558     7553       -5     
  Branches        0       51      +51     
==========================================
+ Hits         6743     6751       +8     
+ Misses        815      795      -20     
- Partials        0        7       +7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.