ci: add init workflow

[rndquu]

Resolves ubiquity/cloudflare-deploy-action#1 (partially)

This PR adds a dummy init workflow which (on completion) triggers the build and deploy workflow so that forked repos could have access to ubiquity org github secrets (in a safe way)

P.S. The "build and deploy" workflow is not triggered in this particular PR because it should be merged first

[github-actions]

Lines	Statements	Branches	Functions
	80% (4/5)	100% (0/0)	66.66% (2/3)

JUnit

Tests	Skipped	Failures	Errors	Time
1	0 💤	0 ❌	0 🔥	2.697s ⏱️

Coverage Report (80%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	80	100	66.66	80
main.ts	80	100	66.66	80	9

[0x4007]

@rndquu looks like you already did it thanks.