DF Branch [DO NOT MERGE]

[WillieRuemmele]

NOTE:
original PR #65 was merged, and reverted #66

this PR reopens the original changes, which have all been approved and merged once-before

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DO NOT MERGE

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What does this PR do?
adds an AFDX: validate afscript context option to .afscript files

What issues does this PR fix or reference?
@W-19293903@

Functionality Before
no NGA functionality

Functionality After
able to quickly validate afScript via server-side compile

Testing Setup Notes
get the built vsix from the clicking on the green checkmark by the commit hash, select build-and-test, click on summary in the upper left, scroll to the bottom for the vsix, installing this, and setting SF_MOCK_DIR should work as well

using maybe-mock in the development extension host session is overly complicated. I found the best approach was to change vscode-agents/node_modules/@salesforce/agents/lib/agent.js Line 323 to be

const response = JSON.parse(await (0, promises_1.readFile)('YOUR/PATH/TO/agents/test/mocks/einstein_ai-agent_v1.1_authoring_compile.json', 'utf-8'));

and an example failure response,

{
"status": "failure",
"errors": [{
"errorType": "ISSUE",
"description": "couldn't compile this",
"colStart": 1,
"colEnd": 2,
"lineStart": 1,
"lineEnd": 1
},
{
"errorType": "ISSUE123",
"description": "testing error 2",
"colStart": 12,
"colEnd": 22,
"lineStart": 12,
"lineEnd": 12
}],
Note: there's an error property already in the mock, you just need to place those correctly and update the status for a failure response