feat: blocksuite integration for pageMode & pageUpdatedAt

[AyushAgrawal-A2]

Changes:

• Added integration for pageMode and pageUpdatedAt, required for linked / synced doc block.

• Added linkPreviewUrl for embed github, youtube & loom

• Fixed imageProxyUrl config for clipboard middleware. Due to missing editor.updateComplete for onLoad function,
  AFFiNE's imageProxyUrl -/api/worker/image-proxy was never getting set before. Hence all proxy requests were going to the default proxy url in blocksuite - https://affine-worker.toeverything.workers.dev/api/worker/image-proxy.
  before:
  

  after:
  

P.S.:

1. There was a bug in blocksuite, where proxy fetch was missing response.ok check. This is fixed in fix(page): correct image fetch via proxy with response.ok check blocksuite#6251 and requires blocksuite bump for tests to pass.
2. Recent change in affine-worker regarding image proxy can be reverted, if required, as now with correct proxy config requests will not go to https://affine-worker.toeverything.workers.dev/api/worker/image-proxy for local dev / tests. cc @darkskygit

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (53b312c) 64.60% compared to head (2a7ca32) 64.51%.

Additional details and impacted files

@@            Coverage Diff             @@
##           canary    #5849      +/-   ##
==========================================
- Coverage   64.60%   64.51%   -0.10%     
==========================================
  Files         360      360              
  Lines       19956    19956              
  Branches     1702     1701       -1     
==========================================
- Hits        12892    12874      -18     
- Misses       6845     6863      +18     
  Partials      219      219              

Flag	Coverage Δ
server-test	71.35% <ø> (-0.13%)	⬇️
unittest	45.37% <ø> (ø)

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