FEI-5001: Switch to TS enums, remove Flow infra

[kevinbarabash]

Summary:

Now that none of the downstream consumers of wonder-stuff are using Flow we can get rid of Flow related things from this repo.

Issue: FEI-5001

Test plan:

• yarn build:types
• yarn tsc
• yarn build:docs, open docs/index.html, see that Runtime is now a proper enum

[changeset-bot]

🦋 Changeset detected

Latest commit: 3db2a18

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 7 packages

Name	Type
@khanacademy/wonder-stuff-server	Major
ws-dev-build-settings	Minor
@khanacademy/wonder-stuff-ci	Patch
@khanacademy/wonder-stuff-render-environment-jsdom	Patch
@khanacademy/wonder-stuff-render-server	Patch
@khanacademy/wonder-stuff-sentry	Patch
@khanacademy/wonder-stuff-testing	Patch

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[khan-actions-bot]

Gerald

Required Reviewers

• @Khan/frontend-infra for changes to package.json, .changeset/silver-experts-attend.md, .changeset/young-cameras-fail.md, packages/tsconfig-shared.json, .github/workflows/node-ci.yml, packages/wonder-stuff-server/src/types.ts, packages/wonder-stuff-render-server/src/__tests__/run-server.test.ts, packages/wonder-stuff-render-server/src/__tests__/start-trace-agent-impl.test.ts, packages/wonder-stuff-server/src/middleware/wrap-with-middleware.ts, packages/wonder-stuff-server/src/middleware/__tests__/request-authentication.test.ts

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[codecov]

Codecov Report

Merging #852 (3db2a18) into main (9950616) will not change coverage.
Report is 32 commits behind head on main.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #852   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           96        96           
  Lines         1371      1368    -3     
  Branches       352       337   -15     
=========================================
- Hits          1371      1368    -3     

Files Changed	Coverage Δ
...tuff-server/src/middleware/wrap-with-middleware.ts	100.00% <ø> (ø)

... and 3 files with indirect coverage changes

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[github-actions]

Size Change: 0 B

Total Size: 4.51 kB

ℹ️ View Unchanged

Filename	Size
packages/wonder-stuff-core/dist/browser/es/index.js	1.87 kB
packages/wonder-stuff-sentry/dist/browser/es/index.js	1.66 kB
packages/wonder-stuff-testing/dist/browser/es/index.js	972 B

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