add proposal for raven l7

[River-sh]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind documentation
/kind enhancement
/kind design
/sig network

What this PR does / why we need it:

A detailed design is used to develop raven's layer-7 proxy

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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In response to this:

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind documentation
/kind enhancement
/kind design
/sig network

What this PR does / why we need it:

A detailed design is used to develop raven's layer-7 proxy

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[codecov]

Codecov Report

Merging #1541 (7803dd5) into master (6a22238) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1541   +/-   ##
=======================================
  Coverage   51.43%   51.43%           
=======================================
  Files         134      134           
  Lines       15947    15947           
=======================================
  Hits         8202     8202           
  Misses       7000     7000           
  Partials      745      745           

Flag	Coverage Δ
unittests	51.43% <ø> (ø)

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.6% Duplication

[rambohe-ch]

/lgtm

[rambohe-ch]

/approve

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rambohe-ch, River-sh

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