docs(frontend): update new structure and landing page

[yuxizama]

• Add a landing page
• Reorganize existing docs
• Add new designs

[bcm-at-zama]

I'll have a look on monday

[bcm-at-zama]

D docs/application-tutorial/key_value_database.md (3)
D docs/application-tutorial/sha256.md (3)

looks strange. I'm afraid you deleted the files. I guess it was not the intention, we can resurrect them

EDIT: my bad, it's ok, @yuxizama just removed the .md, not the sources so ok

[bcm-at-zama]

Fixing conflicts

[bcm-at-zama]

I need to fix the build.

[bcm-at-zama]

Lot of broken links to fail: I'm on it

[yuxizama]

FILE: ./docs/SUMMARY.md
[✖] explanations/compilation/FHELinalgDialect.md → Status: 400
Change link from explanations/compilation/FHELinalgDialect.md to docs/explanations/FHELinalgDialect.md
[✖] explanations/TFHEDialect.md
Move doc to: docs/explanations/TFHEDialect

FILE: ./docs/explanations/dialects.md
[✖] TFHEDialect.md → Status: 400
same as above, need to move this file to docs/explanations/TFHEDialect
[✖] ../../_static/compilation-pipeline/compilation-flow.png → Status: 400
Change link from /github/workspace/_static/compilation-pipeline/compilation-flow.png to docs/_static/compilation-pipeline/compilation-flow.png

FILE: ./docs/explanations/optimizer.md
[✖] ../security/security_curves.md → Status: 400
Change link from /github/workspace/docs/security/security_curves.md to docs/dev/security/security_curves.md
[✖] ../../../compilers/concrete-optimizer/v0-parameters/ref/v0_last_128 → Status: 400
Change link from /github/compilers/concrete-optimizer/v0-parameters/ref/v0_last_128 to compilers/concrete-optimizer/v0-parameters/ref/v0_last_128
[✖] ../../../compilers/concrete-optimizer/v0-parameters/README.md → Status: 400
Change link from /github/compilers/concrete-optimizer/v0-parameters/README.md to compilers/concrete-optimizer/v0-parameters/README.md

FILE: ./docs/get-started/quick_start.md
[✖] ../tutorial/extensions.md#fheinputset → Status: 400
The H2 has been changed in the file to /tutorial/extensions.md#fheunivariatefunction

FILE: ./docs/dev/compilation/README.md
[✖] ../fusing.md → Status: 400
change link from /github/workspace/docs/dev/fusing.md to docs/dev/fusing.md

[yuxizama]

FILE: ./docs/core-features/extensions.md
[✖] ../_static/tutorials/relu/configuration_and_cost.png → Status: 400
Change link from /github/workspace/docs/_static/tutorials/relu/configuration/_and/_cost.png to docs/_static/tutorials/relu/configuration_and_cost.png

FILE: ./frontends/concrete-python/examples/xor_distance/xor_distance.md
[✖] ../../frontends/concrete-python/examples/xor_distance/hamming_distance.py → Status: 400
Change link from /github/workspace/frontends/concrete-python/frontends/concrete-python/examples/xor_distance/hamming_distance.py to frontends/concrete-python/examples/xor_distance/hamming_distance.py

FILE: ./frontends/concrete-python/examples/game_of_life/game_of_life.md
[✖] ../_static/game-of-life.gif → Status: 400
Change link from /github/workspace/frontends/concrete-python/examples/_static/game-of-life.gif to docs/_static/game-of-life.gif

[bcm-at-zama]

Approved

[bcm-at-zama]

Thx @yuxizama !