Show the TechJSON schema in readthedocs

[harrisonliew]

Uses sphinx-jsonschema combined with an additional post-install command to make readthedocs generate tables corresponding to the hierarchical BaseModels under the TechJSON class (must run python command manually if you want it to work locally).
Also had to increase the max width to 1200px to get the tables to fit using sphinx_rtd_size.
poetry.lock updated to reflect the added dependencies.

This is what it renders as: https://hammer-vlsi.readthedocs.io/en/tech_schema/Technology/Tech-json.html#full-schema

Additional misc. fixes + adding architecture diagram from DAC paper.

Related PRs / Issues

Suggested by @vighneshiyer in #172

Type of change:

• Bug fix
• New feature
• Other enhancement

Impact:

• Change to core Hammer
• Change to a Hammer plugin
• Other

Contributor Checklist:

• Did you set master as the base branch?
• Did you state the type-of-change/impact?
• Did you delete any extraneous prints/debugging code?
• (If applicable) Did you add documentation for the feature?
• (If applicable) Did you update the poetry.lock file if you updated the requirements in pyproject.toml?
• (If applicable) Did you add a unit test demonstrating the PR?
• (If applicable) Did you run this through the e2e integration tests?
• (If applicable) Did you update the submodules in e2e/ if this feature depends on updated plugins?