feat: add x oauth provider to console

[HarshMN2345]

What does this PR do?

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[greptile-apps]

Greptile Summary

This PR adds X (formerly Twitter) as a new OAuth2 provider in the console by registering a new x entry in oAuthProviders, adding matching X logo SVGs, and removing the now-orphaned Twitter bird SVGs. It also fixes a reactivity bug in the auth settings page: data.project was previously destructured as a static snapshot; it is now $derived so that invalidate(Dependencies.PROJECT) correctly triggers re-renders.

Confidence Score: 4/5

Safe to merge; changes are additive and self-contained. The only external dependency is that the Appwrite backend exposes an OAuth provider with key x.

All code changes are minimal and low-risk: a new record in a static map, four SVG icon swaps, and a one-line reactivity fix. No logic paths are removed or altered in a breaking way. Score is 4 rather than 5 because the feature's end-to-end correctness depends on the backend returning key: "x" in project.oAuthProviders, which is a cross-repo dependency not verified in this PR.

No files require special attention; cross-repo backend alignment is the only remaining concern.

Vulnerabilities

No security concerns identified. The new OAuth provider entry uses an HTTPS docs URL and delegates authentication flow to the existing Main component, which is already used by the majority of providers.

Important Files Changed

Filename	Overview
src/lib/stores/oauth-providers.ts	Adds new x provider entry between wordpress and yahoo with correct icon, docs URL, and Main component; alphabetical order is preserved.
src/routes/(console)/project-[region]-[project]/auth/settings/+page.svelte	Changes const { project } = data to $derived(data.project) so the variable stays reactive after invalidate(Dependencies.PROJECT) calls — a correct Svelte 5 runes fix.
static/icons/dark/color/x.svg	New X logo SVG (20×20, white fill #F7F8F8) replacing the deleted Twitter bird SVG; size matches the img element's height="20" width="20" in the page template.
static/icons/light/color/x.svg	New X logo SVG (20×20, dark fill #0F1419) replacing the deleted Twitter bird SVG for the light theme.
static/icons/dark/grayscale/x.svg	New X logo grayscale SVG (20×20) for dark theme, replacing deleted Twitter grayscale SVG.
static/icons/light/grayscale/x.svg	New X logo grayscale SVG (20×20) for light theme, replacing deleted Twitter grayscale SVG.

_{Reviews (1): Last reviewed commit: "feat: add x oauth provider to console" | Re-trigger Greptile}