remove send-request

[jackkav]

Eliminates the send-request abstractions and transpiler step build:sr, in favour of npm workspaces monorepo references.

• use direct import rom insomnia package
• cleanup references to send-request
• remove unnecessary const export
• fix type-check and lint

closes INS-4189

[sentry]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: packages/insomnia/src/common/render.ts

Function	Unhandled Issue
getRenderContext	[**SyntaxError: Invalid regular expression: /{{ ?{{_['pvi-api-key']}}[

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