feat: add toggle functionality for enabling/disabling/reloading all MCP servers #7537

Job	Run time
knip	56s
test-extension (ubuntu-latest)	2m 44s
check-translations	47s
compile	1m 24s
test-webview (ubuntu-latest)	1m 1s
test-extension (windows-latest)	3m 45s
test-webview (windows-latest)	2m 13s
check-openrouter-api-key	1s
integration-test	0s
unit-test	1s
	12m 52s

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