refactor: Types and tmp caching

[bmingles]

Refactored a few things

• Fixed base DhService + constructor type in preparation for DHE support
• Installed @deephaven/jsapi-types and deleted shim types
• Tweaked tmp storage to store to src/dist root and to store jsapi by server url
• Enabled no-unused-vars linting rule

supports #79

[github-actions]

End-to-end Test Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
3	3	0	0	0	0	0	01:59:45

A ctrf plugin

Detailed Test Results

Name	Status	ms	Flaky 🍂
should be able to load VSCode	passed ✅	951
should only be visible when a supported file type is active: test.groovy	passed ✅	2948
should only be visible when a supported file type is active: test.py	passed ✅	1097

A ctrf plugin

Failed Test Summary

No failed tests ✨

Flaky Test Summary

No flaky tests detected. ✨

[github-actions]

Unit Test Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
17	17	0	0	0	0	0	00:00:00

A ctrf plugin

Detailed Test Results

Name	Status	ms	Flaky 🍂
src/services/Config.spec.ts: Config > should return core servers: Empty config	passed ✅	3
src/services/Config.spec.ts: Config > should return core servers: String config	passed ✅	0
src/services/Config.spec.ts: Config > should return core servers: Default url	passed ✅	0
src/services/Config.spec.ts: Config > should return core servers: Full config	passed ✅	2
src/util/ExtendedMap.spec.ts: ExtendedMap Test Suite > getOrThrow	passed ✅	2
src/util/downloadUtils.spec.ts: getTempDir > should create temp directory if it does not already exist: true, undefined	passed ✅	4
src/util/downloadUtils.spec.ts: getTempDir > should create temp directory if it does not already exist: true, subDirectory	passed ✅	1
src/util/downloadUtils.spec.ts: getTempDir > should create temp directory if it does not already exist: false, undefined	passed ✅	1
src/util/downloadUtils.spec.ts: getTempDir > should create temp directory if it does not already exist: false, subDirectory	passed ✅	1
src/util/downloadUtils.spec.ts: getTempDir > should remove directory if recreate is true: true, undefined, /home/runner/work/vscode-deephaven/vscode-deephaven/src/tmp	passed ✅	2
src/util/downloadUtils.spec.ts: getTempDir > should remove directory if recreate is true: true, subDirectory, /home/runner/work/vscode-deephaven/vscode-deephaven/src/tmp/subDirectory	passed ✅	1
src/util/downloadUtils.spec.ts: getTempDir > should remove directory if recreate is true: false, undefined, /home/runner/work/vscode-deephaven/vscode-deephaven/src/tmp	passed ✅	1
src/util/downloadUtils.spec.ts: getTempDir > should remove directory if recreate is true: false, subDirectory, /home/runner/work/vscode-deephaven/vscode-deephaven/src/tmp/subDirectory	passed ✅	0
src/util/urlUtils.spec.ts: urlUtils > should convert url to host_port string: http://localhost:4000, localhost_4000	passed ✅	2
src/util/urlUtils.spec.ts: urlUtils > should convert url to host_port string: https://localhost:5000, localhost_5000	passed ✅	2
src/util/urlUtils.spec.ts: urlUtils > should convert url to host_port string: http://www.acme.com:6000, www_acme_com_6000	passed ✅	0
src/util/urlUtils.spec.ts: urlUtils > should convert url to host_port string: https://www.acme.com:7000, www_acme_com_7000	passed ✅	0

A ctrf plugin

Failed Test Summary

No failed tests ✨

Flaky Test Summary

No flaky tests detected. ✨