fix web typo and add requirement

[Tednoob17]

Hi inside a previous readme a folder web was used but not exist so i remove it .

• A project use a cargo during Ammonia installation but without cargo installed on user machine a crash occured.
• A bun also need for installation so i add it in installation requirement part
• Custom and Iframeview are used in project but not listed.
• And I also update angular.io link who recently do a 302 return to angular.dev

[Copilot]

Pull request overview

This PR updates installation/docs and share-link encoding to reflect current project structure and tooling requirements, and to improve share URL robustness.

Changes:

• Make postinstall:ammonia-wasm conditional on cargo availability.
• Switch shared-state URL hash encoding to b64EncodeUnicode(...) for Unicode-safe base64.
• Refresh README: remove obsolete web/ folder reference, add prerequisites (Bun/Rust), expand supported pipeline list, and update Angular link to angular.dev.

Reviewed changes

Copilot reviewed 4 out of 7 changed files in this pull request and generated 2 comments.

File	Description
package.json	Adjusts postinstall behavior for building the Ammonia WASM package based on cargo availability.
app/pages/shared.vue	Updates share-state hash encoding to use the project’s Unicode-safe base64 helper.
README.md	Updates install instructions/prerequisites, supported pipeline list, and fixes outdated links/paths.

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