Shell integration: Setup mechanism for listening to shell integration sequences and light up capabilities

[Tyriar]

Parent issue #133084

The shell integration script will emit sequences that we need to handle via an xterm.js sequence handler. We may want to only light up capabilities on the terminal process once we have verified that feature works?

We also need to handle partial capabilities: On Windows may not work 100% since for example it emits the sequences in the renderer, not in the actual order they happened (microsoft/terminal#11220, microsoft/terminal#8698). Should we wait for the sequence to come and if the positioning of the prompt looks off don't turn on a particular capability?

[meganrogge]

done here

vscode/src/vs/workbench/contrib/terminal/browser/xterm/shellIntegrationAddon.ts

Lines 86 to 87 in 9817557

	this._register(xterm.parser.registerOscHandler(ShellIntegrationOscPs.FinalTerm, data => this._handleShellIntegration(data)));
	this._register(xterm.parser.registerOscHandler(ShellIntegrationOscPs.ITerm, data => this._updateCwd(data)));

should this be closed?

[Tyriar]

This should be mostly done with #140635