feat: Implement partially local Snaps execution environment

[FrederikBolding]

Description

Replaces the remote WebView with a locally bundled WebView. This WebView still uses a remote iframe for execution, but the initial load will be using all local code. This is attempt number two since #10214 was reverted. This PR is slightly different from the aforementioned PR since the HTML is inlined using babel-plugin-inline-import AND the execution environment is considered a secure context due to the baseUrl being set.

Related issues

Fixes:

Manual testing steps

1. Install any Snap
2. See that it works

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[socket-security]

👍 Dependency issues cleared. Learn more about Socket for GitHub ↗︎

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

Ignoring: npm/babel-plugin-inline-import@3.0.0

View full report↗︎

Next steps

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[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[socket-security]

New dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/babel-plugin-inline-import@3.0.0	filesystem	0	11.9 kB	aldeed
npm/path-extra@1.0.3	environment	0	6.46 kB	jprichardson
npm/require-resolve@0.0.2	None	0	17.3 kB	qiu8310
npm/x-path@0.0.2	filesystem	0	11.3 kB	qiu8310

View full report↗︎

[Jonathansoufer]

LGTM. Tested on real device and simulators.

[FrederikBolding]

@SocketSecurity ignore npm/babel-plugin-inline-import@3.0.0

New author ok.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[Jonathansoufer]

Reapproving after allowlist change.