Flow Providers: Non-custodial wallets #28 - Milestone 1 - Lay2 Submis…

…sion (#116)

* Create milestone-1.md

* Update milestone-1.md

Typo fixes;
Introduction article link added.

submissions/issue-28/lay2dev/milestone-1.md

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+## Flow Providers: Non-custodial wallets - Milestone 1
+
+## Description
+
+This PR is for issue [#28](https://github.com/onflow/flip-fest/issues/28).
+
+- We have complete the design of the wallet.
+ - Brief introduction of the features we'll cover and how we'll achieve them.
+ - Details about the architecture of key management and user flow.
+ - Prospects to the future when we can implement the full version of UniPass on Flow to present a keyless experience for users in an non-custodial way.
+
+## Submission Links & Documents
+
+- Document link: https://lay2.notion.site/UniPass-Flow-Wallet-Design-4b165a80e5ba4e64b7051461fab3a0cf.
+
+## Requirements Check
+
+- Have have you met the milestone requirements?
+  - Yes
+- Have you included tests (if applicable)?
+  - No tests for this milestone
+- Have you met the contribution guidelines of the repos you have submitted code to (if applicable)?
+  - No code for this milestone
+
+## Other Details
+
+- Is there anything specific you'd like the PoC to know or review for?
+  - UniPass has one of the best account abstraction design, yet it requires RSA signature verification ability from the Layer1 to make it possible.
+  - For now we have to use mnemonics as the backup method, which we think is too much for ordinary users.
+  - We would like to bring an Internet experience also to Flow users, so maybe we can discuss about this feature after we complete this request.
+  - Introduction ariticle about UniPass: https://medium.com/unipass/unipass-your-universal-crypto-identity-in-metaverse-b8b932f9313f
+
+- Are there other references, documentation, or relevant artifices to mention for this PR (ie. external links to justify design decisions, etc.)?
+  - UniPass adheres to a pure web format, so as to achieve maximum compatibility and cross-platform ability, and significantly reduce user cost with instant access through links.
+  - We are not compromising on security because of convenience, because we manage the keys through built-in managers of the browsers(SubtleCrypto) and even the devices(Webauthn).