[REL-7521] Rel 7521 fix bug in ld vs code integration setup process

[charlottemorgan]

Problems to solve:

• If token was entered incorrectly or as an empty string, auth would fail with no way to try again
• Unable to end session or log out - secret store was never being cleared
• Code wouldn't run due to out of date dependencies

Changes:

• Added custom error handling to avoid vscode defaults
• Session validation: Added checks to handle empty or invalid sessions
• Session cleanup: Proper deletion of invalid sessions from secrets store
• Added sign out command to facilitate session clean up
• Added Sign out option in Feature Flags tree view header
• Updated readme with instructions on how to run extension for development & user instructions for authentication
• Updated Axios

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Related Jira issue: REL-7521: Fix bug in LD VS Code Integration setup process

[Copilot]

Pull Request Overview

This PR fixes authentication and session management issues in the LaunchDarkly VS Code extension, improving the setup process and adding proper session cleanup functionality.

• Fixes auth failure scenarios with no retry mechanism and improves error handling
• Adds sign out functionality with proper session cleanup
• Updates dependencies (Axios to v1.6.0) and build process

Reviewed Changes

Copilot reviewed 17 out of 19 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/utils/commands.ts	Updates command constants for sign-in and adds sign-out command
src/providers/authProvider.ts	Improves session validation, error handling, and adds proper session cleanup
src/extension.ts	Adds sign-in/sign-out command handlers with better error handling
src/generalUtils.ts	Adds session cleanup function and improves component management
src/api.ts	Updates to use modern Axios import and improves error handling
package.json	Updates Axios dependency and adds sign-out command configuration
README.md	Adds authentication instructions and development setup guide

Comments suppressed due to low confidence (1)

package.json:1

• The dependency "tree-sitter-stack-graphs" is being removed but the line shows it's still present. This appears to be an incomplete removal.

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[monsagri]

I think this looks really good!
Ran it locally and it definitely works for me

One recommendation I would have is to also update the release workflow for GHA - I think it'll attempt to run once we merge this and fail since we haven't upgraded the actions it uses to v4 yet

[ldhenry]

Looks good to me. Thanks for your help on this!